Читать книгу: «Among the Birds in Northern Shires», страница 11

The St. Kildans are expert fowlers, snaring the Fulmars as they sit upon their nests, with long rods to which a horse-hair noose is attached. The birds that breed here are the source of the St. Kildans' wealth; thousands of them are killed and salted for food; thousands of eggs are taken for a similar purpose. When caught, the Petrels are made to vomit a quantity of oil into the dried gullet of a Gannet that the fowler carries attached to him; and this oil, together with the feathers from these birds, Gannets and others, are also a further source of income.

CHAPTER X
MIGRATION IN THE NORTHERN SHIRES

We propose to bring the present volume to a close by a brief review of the more salient features of avine migration in the northern shires, especially as it is presented on the coasts of Lincolnshire and Yorkshire, and in some of the river-valleys in the south of the latter county. It is perhaps in the migration of birds that comparisons become most pronounced between the avine characteristics of the northern and south-western counties of England. In the latter area, as we have already pointed out, not only in our volume dealing with the season-flight of British birds, but in another devoted to bird-life in a southern county, migration is almost as remarkable for what it omits as for what it includes; the south-west peninsula of England being singularly poor in migrational phenomena. In the northern shires, on the other hand, the story of migration is unfolded every season in all its wondrous grandeur, and along our eastern sea-board, especially in autumn, birds in uncounted hosts pass to and fro in a way more impressive than any words can tell. Another thing, there is infinitely more local movement amongst birds in the northern shires than in the southern and south-western counties. The former area is subject to much greater climatic vicissitudes, to sudden falls of temperature, and heavy snow-storms, disturbances that have a marked effect upon birds, and cause them to wander to an extent seldom remarked in the south-west, where conditions are much more equable and the temperature uniformly higher. For instance, we believe the isotherm of January in Yorkshire and Lincolnshire is about 37°, whilst in the south-west of England it is as high as 43°. In one way the southern counties possess perhaps an exceptional migrational interest, from the fact that they are the first point of arrival as they are the last of departure of birds moving north or south into or from the British area. But many of the northern shires are exceptionally fortunate, for on their coast-line breaks that mighty tide of east-to-west migration in autumn, as also that from the north and north-east at that season, together with the departures in the reverse direction in spring – movements which are but faintly or never indicated at all in the south-west of England. In that remote district the tide of migration from the north and north-east is comparatively weak and exhausted by the time it is reached.

In spring, migration in the northern shires is to some extent, and in certain directions, perceptibly less marked than it is in many of the southern counties, especially as regards our normal summer migrants. It is, on the other hand, more emphasized in connection with the spring departure of birds that breed in northerly or easterly localities beyond the British area, and also perhaps in so far as it relates to the coasting migration of certain species. Here in the northern shires, as elsewhere, the first indication of migratory movement among the birds is the departure of some of the species that have been spending the winter in them. But so far as South Yorkshire is concerned, perhaps we ought to say that migration is absolutely initiated by the return of the Song Thrush at the end of January or early in February, and of many Blackbirds at the beginning of the latter month – individuals breeding in this district, but leaving it in November. The movement may be small and comparatively unimportant, nevertheless it is to be remarked by the careful observer of birds. There is also some slight movement north or north-east of the Redwing and the Fieldfare; whilst Song Thrushes and Blackbirds that have been wintering in the southern portions of our islands begin to migrate towards continental and perhaps North British haunts. The same remarks also apply to the Robin, the Greenfinch, the Linnet, the Chaffinch, the Tree Sparrow,³ the Snow Bunting, the Sky-lark, and the Shore Lark especially. Starlings, Jackdaws, and Rooks also initiate a migrational movement during February; and there is also some evidence to show that Sparrow-hawks, Bitterns, Geese, Swans, many Ducks, Ring Doves, Golden Plovers, Lapwings, Woodcocks and Snipes, Redshanks, Curlews, Little Auks, the three British species of Divers, and the Red-necked and Sclavonian Grebes are at least in movement of a definite character. This applies not only to an actual departure from our shores, but to a coasting movement across them from winter stations still farther south. With the exception, perhaps, of the Shore Lark and the two species of Swans, the migration can only be regarded as slight, and becomes in the majority of cases much more emphasized in the following month, more especially as concerns the Song Thrush, the Greenfinch, the Linnet, the Chaffinch, the Sky-lark, the Starling, and the Jackdaw among Passerine birds; and the Bernacle and Brent Geese, the Mallard and other Ducks, the Snipes and the Divers among others. It will be remarked that the earliest birds to leave are those that breed in continental areas due east of the British area; the next species to go are such as have their breeding-places in a general north-easterly or north-westerly direction. It should also be stated that many species – especially among the Ducks and Waders – are still found on passage in the northern shires, long after they have finally deserted our southern coasts for the season. Thus the Scoters mostly leave Devonshire during March and April, but they are still passing the coasts of Yorkshire in May; the Jack Snipe, the Dunlin, and the Sanderling leave in March; in the northern shires they are still on passage in April and May.

With the advent of March a further exodus of our winter visitors takes place, and many of these birds continue to leave throughout this and the following month. March initiates a migration north of the Stonechat, the Hedge Accentor, the Goldcrest, the Titmice, the Pied Wagtail, and the Wren, the Goldfinch and the Brambling, the Yellow, Common, and Reed Buntings, the Carrion and Hooded Crows, the Jay, and the Short-eared Owl, the White-fronted, Bean, and Pink-footed Geese, the Teal and the Wigeon, the Tufted Duck and the Golden-eye, the Gray Plover, the Turnstone, the Dunlin, and the Purple Sandpiper. This movement is continued throughout the month and into April, in many cases gradually dying out in May. Fieldfares and Redwings migrate in large numbers during April, as also do Goldcrests, some of the Finches, Snow Buntings, Starlings, Golden Plovers, and Woodcocks; Dunlins perhaps leave most abundantly in May, as also do Turnstones, Gray Plovers, Knots, Sanderlings, and Godwits – birds that breed late in the arctic regions. The coasting migration of the Pied Wagtail, the Hen Harrier, the Merlin, the Ringed Plover, the Ruff, the Whimbrel, the Little Stint, and the Curlew Sandpiper is most apparent in April and May; the Skuas perhaps in April, with the exception of Buffon’s Skua, that is still passing the coasts of the northern shires in May and even early June.

This grand departure of birds, however, does not appeal to the ordinary observer one quarter as much as the arrival in spring of the first Swallow or Cuckoo – birds which he associates inseparably with the so-called mystery of migration. As it is always more difficult to detect a departure than note an arrival, all these other birds slip away during spring almost without being missed, and more especially so because few of them are familiar species; whilst such that are more widely known are usually still represented by sedentary individuals. We allude to such species as Wrens, Robins, Titmice, Greenfinches, Chaffinches, Hedge Sparrows, and so on. To the ordinary observer, then, spring migration apparently commences with the appearance of the first of our usual summer migrants – birds that come to our country to breed, and leave it again without fail in autumn. This northern movement is remarked, even in our northern shires, during the latter half of March. In the north of England, as it is in the south, the Chiffchaff is perhaps the most constant pioneer of the spring migrants. We have known this bird arrive in Devonshire as early as the 5th of March; in Yorkshire we have observed it a week later. These dates are somewhat exceptional, but we can pretty safely depend upon its appearance towards the end of that month. The migrations of the Wheatear are practically coincident in date. In fact this bird, we believe, has been recorded from the northern shires as early as February, but this is certainly abnormal. The migrations of both species are, however, much more marked in April. Another March migrant is the Ring-ouzel, but these are venturesome birds ahead of their companions, and the usual date of this bird’s arrival in the northern shires is April. Similarly, the Blackcap has been known to arrive in March, but its normal date is the first week or so in April. This latter month brings the migrants back in constantly increasing numbers, amongst which we may mention the Redstart, the Whinchat, the Willow Wren, the Wryneck, and the Cuckoo. Now during this month, especially during the latter half, may also be noticed in their old accustomed haunts the Whitethroat and its congener the Lesser Whitethroat, the Reed Warbler and the Sedge Warbler, the Grasshopper Warbler, the Tree Pipit, the Pied Flycatcher, the Swallow, and the two species of Martins. At the end of the month and early in May come the Garden Warbler, the Wood Wren, the Tree Pipit, the Spotted Flycatcher, the Swift, and the Nightjar. The Merlin migrates in April, as also does the Hen Harrier; towards the end of the month we have the Quail, the Stone Curlew, the Landrail, the Red-necked Phalarope, the Greenshank, and the Common Sandpiper. The passage of most of these birds continues into May, which is the usual date for the arrival of the Turtle Dove, one of the very last to reach the northern woodlands. We may remark that many of our more familiar summer migrants continue to pass the northern shires well into May – individuals bound for higher latitudes than Britain.

Spring migration is scarcely over for the year when signs of the return movement begin to be seen. Indications of the southern exodus first become apparent upon the coast with the arrival usually of a few northern wading birds by the middle or towards the end of July. Records kept along the coast also show that Wheatears, Swallows, Martins, Pied Wagtails, Song Thrushes, Robins, Goldcrests, Wrens, Whitethroats, Starlings, Cuckoos, and Landrails are certainly on the move. In August migration becomes stronger, not only as regards birds that are coming into our area for the winter, or simply passing over it to more southern latitudes, but also those that, having bred in this country, are now leaving it for winter quarters beyond the English Channel. Among Passerine birds that are now entering the British area may be mentioned the Missel-thrush, the Song Thrush, the Redwing, and the Blackbird. Each of these, however, will continue to arrive in much greater numbers during September and October, the migration dying down again in November. Stonechats are now returning to us, as also in small numbers are Robins and Hedge Accentors, both of which will arrive in greater abundance during the two succeeding months. The same remarks almost exactly apply to the Titmice, the Goldcrest, the Wren, and the Pied Wagtail. Amongst the hard-billed Passeres such birds as Linnets, Greenfinches, Chaffinches, Yellow Buntings, and Tree Sparrows are also returning; as are also Sky-larks, Starlings, Rooks, and Short-eared Owls. Among the Duck family and the Waders, the Bernacle and Brent Geese, the Mallard, the Teal and Wigeon, the Scaup and the Scoters; Plovers, Turnstones, Woodcock and Common Snipe, Ruffs, Redshanks, Curlews, Godwits, Dunlins, Knots, and Sanderlings are now migrating, but their numbers will enormously increase during the two, or in some cases even three, succeeding months. But few of our own summer birds depart from the northern shires in August, but there is certainly a coasting movement apparent among most of the species – individuals coming from more northern areas and passing over Britain to winter homes in South Europe and Africa. There can be little doubt, however, that many individual Whitethroats, Willow Wrens, Spotted Flycatchers, and Turtle Doves move south from their summer haunts in the northern shires during August. During this month the Swift and the Cuckoo leave us, although some few of the latter may remain into September. Speaking of Swifts brings to mind a very extraordinary migration of this species that we witnessed in the early part of August, 1879, on the Yorkshire coast at Flamborough. There must have been tens of thousands of birds passing down the coast just below the lighthouse; all day the birds kept migrating on in a leisurely sort of way, feeding as they went, and a very large percentage consisted of young ones. During late August many bands of Terns migrate south along the Yorkshire coast, not only from the Farne Islands, but from more northern stations still.

During September most of our own summer migrants disappear, but the Ring-ouzel, the Whinchat, and the Wheatear prolong their passage into October, as also does the Whitethroat, the Chiffchaff, the Willow Wren, the Sedge Warbler, the Swallows and Martins, the Common Sandpiper, and some others, but all in a more or less exceptional manner. Up to the end of this month birds are constantly pouring into our islands from the north and north-east; in October the general trend of migration falls to nearly due east, and from this date onwards some of the most wonderful scenes imaginable are to be witnessed upon many parts of our eastern coast-line, more especially between Spurn in Yorkshire and the Wash in Lincolnshire. Our own observations principally refer, so far as this grand avine movement is concerned, to the latter district. Here season after season we have watched during the late October and early November days that wonderful influx of feathered life that breaks like the waves of the ocean upon the shore, often in such multitudes as to defy estimation. Indeed, we know of no other place on the entire coast-line of the British Islands where the fascinating phenomenon of migration can be studied to better advantage. Along this coast, at intervals during the autumn, birds literally pour in from across the North Sea, or are tempted to loiter upon it when following the entire line of our eastern sea-board to winter quarters far to the south of the British archipelago. Few wilder districts can be imagined, few more monotonous, and even dreary, than the vast expanses of mud and sand that fringe the Wash. At high-water the tide comes up close to the huge banks that extend along the coast here, erected for the purpose of keeping out the sea from the adjoining farms; although it is said that these earth-works are the remains of Roman roads. At low-water the sea is several miles from the banks, and the vast expanse of mud is scored in many directions with tortuous streams and long narrow pools. In summer few birds frequent the place; in autumn it is a grand resort of birds, being in the direct pathway of that vast stream of migrants that flows across the wild North Sea from regions possibly as remote as Siberia.

Although a very large proportion of indigenous British birds are migratory – probably the greater number – a great many of these undertake their annual journeys in such a very modest and undemonstrative way that they escape general notice. On the other hand, there are a certain if small number of species that migrate in such vast numbers that even the most casual observer cannot fail to remark the fact. Of this small proportion the Goldcrest, the Sky-lark, and the Hooded Crow are certainly amongst the most prominent. The migrations of the first-named bird in autumn are sometimes on a prodigious scale. The autumn of 1882 was remarkable in this respect, especially as regards the Yorkshire and Lincolnshire coasts. This migration appears to have first been recorded from Redcar on the 13th of August. During this month the birds came in comparatively small numbers, which did not appreciably increase during September, but in October they poured across the North Sea in countless thousands, and from all parts of the east coast came reports of the unusual visitation. Two nights in October were especially remarkable for the marvellous migration waves of this tiny bird, which not only spread across England, but reached Ireland, and possibly spent themselves in the Atlantic beyond! So far as concerns our own special length of coast-line, the migration appeared to reach its climax on the 8th and the 12th of October, when vast numbers were recorded from Whitby lighthouse; at Flamborough it was reported in unusual abundance between the 7th and the 14th; at Spurn on the 7th and 8th, crowding into the hedgerows and fields near the sea; whilst on the Lincolnshire side of the Humber the 8th was remarkable for these migrants, many of which actually sought refuge amongst the piles on the quays and in the timber yards at Grimsby; in the district of the Wash the poor little birds came on to the coast in a more or less exhausted condition three or four days later, many migrating at night. One favourite line of migration into inland districts of the northern shires, not only of this species, but of Titmice, Chaffinches, Bramblings, and some others, is along the Humber, and down the valley of the Don, which brings them into the coppices and fields of South Yorkshire and North Derbyshire. We have upon many occasions, during the twenty years or so that we resided in Sheffield, met with these waves of migrant Goldcrests and Titmice in the birch and alder coppices of the Rivelin Valley. This district, as the crow flies, is sixty miles from Spurn, at the mouth of the Humber, and about thirty miles from the head of that vast estuary, with an abundance of suitable haunts by the way. Yet this vast tract of intervening country has not absorbed the waves of birds, and we have found them literally swarming in these Rivelin coppices during October. It is also somewhat remarkable how confined these waves of birds in many cases are. For instance, we never met with these birds in numbers at all indicating a strong migration anywhere beyond the somewhat narrow limits of this rock-girdled valley. To have reached it the birds must absolutely have passed over Sheffield in incredible numbers; they also appeared in rushes, that corresponded with similar extensive incursions on the distant coast.

The Sky-lark is perhaps even more interesting in its autumnal invasion of the coasts of the northern shires. Every autumn, especially towards the end of October or early in November, incredible numbers of Sky-larks cross the German Ocean both by day and by night, and land in the district of the Wash, to name but one locality, although similar phenomena may be witnessed here and there from one end of our eastern coast-line to the other, from September onwards. Year after year have we seen this autumn invasion of the Sky-lark. Day and night the migration continues, the birds coming in from the sea in flocks and smaller parties, flying at a moderate height, say from thirty to fifty yards above the earth, and in a by no means hurried manner. We have repeatedly noticed a few birds commence to warble the moment they left the sea and reached the land. Many thousands of these birds continue their way south along the coast, doubtless in some cases to follow the rivers inland; others fly inland over the fields, continuing the exact direction of the course followed over the sea. In the same district the autumnal passage of the Hooded Crow is little if any less impressive. This migration usually commences about the middle of October, and lasts about a month. The arrival of this bird in the Wash district is almost regarded with as much interest as the appearance of the Swallow in spring. Fishermen and farmers in the locality say that the two birds are never seen in the air together, meaning by this that the Swallow has gone to the south before the Crow comes in from the east. Unlike the two other species we have just alluded to, the Hooded Crow migrates exclusively by day – at least that is our invariable experience. During the periods of its passage the bird may be remarked coming towards the land from the sea in parties, in twos and threes, and now and then in a large open flock, flying at a moderate height and in a somewhat slow and deliberate manner. Hundreds of thousands of this species must enter the British Islands by way of the Wash alone. Many of these do not penetrate inland far, but live during the ensuing winter on the farms and saltings; others, however, follow the river-valleys to more central areas. It is interesting to remark, however, that the Hooded Crow does not migrate down the Humber and the Don valley to South Yorkshire, where at all seasons it must be regarded as a rare bird.

There are many other migrants that enter our islands by way of the Wash, some of them specially interesting. One of the most remarkable of these is the Short-eared Owl, another the Woodcock. Very often these two birds arrive together, making the sea passage from the Continent during the same night. The Woodcock, however, appears to fly high; the Owl at no great distance from the water. Large numbers of wading birds also pass along this low coast in autumn; in October the mud-flats there used literally to swarm with them. Here might be seen great flocks of Knots and Dunlins assembled upon the marshes, whilst on the banks of the many tidal streams and pools Redshanks, Curlews, Bar-tailed Godwits, Plovers, and Sanderlings, in parties or singly, might be watched. Keeping us at a more respectful distance were large flocks of Brent Geese, whose noisy clamour came clanging in fitful clashes across the mud-flats; whilst Wigeon, Scoters, and various other Ducks bore them more or less close company. After a migration night it was a most fascinating experience to wander out at dawn among the birds. As we reached the second of the banks nearest to the sea, that crosses the mile or so of straight road that leads from the cockle and shrimp famous village of Friskney, we often used to flush Woodcocks from the ditches at the bottom of the tall white-thorn hedges, and this fact we always regarded as a sure indication that the past night had been a favourable one for migrants. Then more Woodcocks would be flushed from the long dry grass, on the sea-banks; perhaps an Owl; but the latter birds we found to have a greater preference for the large flat turnip-fields just over the earth-works. Then perhaps the warbling cry of the Sky-lark would sound from the still dusky sky – the note of tired pilgrims that had been winging their way across the wild sea whilst men slept, and music which never failed to inspire a feeling of sympathy in us. Poor tired and hungry little birds – we always wished them well. Sometimes we should find the bushes and even the long grass on the banks crowded with tired Goldcrests; some of them, poor little mites, so weary that we have stood and watched them sitting fast asleep or swaying on the twigs utterly overcome with fatigue and hunger, quite exhausted and apparently indifferent to their own safety any longer. Then on some lowering November afternoon an occasional flock of Snow Buntings would suddenly appear on the wild salt-marshes, little strangers from an ice-bound region far away to the north. They would settle upon the weed-grown places, or perhaps amongst the drift and tangled sea-weed upon the shore, and there busily search for food. On other days, earlier in the autumn, vast flights of Finches would arrive, and occasionally immense numbers of such familiar species as Hedge Accentors, Redwings, and Fieldfares; whilst far overhead at intervals during the short autumn days, company after company of Golden Plovers would be noted either flying down the coast towards Norfolk or passing inland. A gale, especially about the time of a new moon, would be sure to bring us interesting birds to the coast. Then the Fork-tailed Petrel would as likely as not be driven ashore; and at such times we have seen Stormy Petrels flitting about over the roofs of the cottages at Friskney – lost birds that had rashly entered the enclosed waters of the Wash and been blown before the stiff nor'-easter right on to the land. Now and then a Fulmar would be caught in the flight nets, and Little Gulls and Great Gray Shrikes appear, whilst the late autumn days sometimes brings a succession of flocks of Ring Doves and many odd Bitterns. Now and then a rare Lapland Bunting is detected along the shores of the Wash; we have shot it there in November close to Wainfleet haven. The Shore Lark is also occasionally met with in this district.

The mortality amongst these autumn migrants can scarcely be over-estimated. Young birds of course predominate in every species, and it is among them that the death-rate is highest. Gales and dark nights, with driving rain or fog, are exceptionally fatal to these journeying birds across the German Ocean. Some of the scenes at the lighthouses and light-ships along the coasts of these northern shires are most impressive on such nights as these. The lost bewildered birds, attracted by the glare of the flashing brilliant lamps, crowd round the lanterns, and many of them not only kill themselves by dashing against the glass but are observed to fall exhausted into the sea below. Birds of many species compose these lost and bewildered flocks. Adversity makes strange companions, as the old saying has it, and never perhaps was it better illustrated than by a crowd of birds at the lantern of a lighthouse. Significantly enough, the return passage in spring is invariably undertaken by numbers scarcely a tithe as great as in autumn – the bulk of the little pilgrims having met their fate either on passage or during the intervening winter.

In the northern shires birds of some species or another are almost constantly moving about throughout the winter months. Even in inland localities this fact is abundantly apparent to the most casual observer of birds. Rough weather and snow-storms are almost invariably accompanied or heralded by wandering flocks of Lapwings and Larks; Finches and Fieldfares are constantly moving about as the food supply becomes exhausted or inaccessible in various districts; Ducks and other water-fowl change their haunts as frost compels them. We might also here allude to the considerable amount of vertical migration that takes place in the northern shires – that movement between the uplands and the low-lying country and littoral districts, undertaken by such species as Twites, Merlins, Meadow Pipits, Lapwings, Plovers, Curlews, Mallards, and some few other Ducks. This movement has already been described in detail in our accounts of these various species, so it is not necessary to treat with it here at greater length. It is, however, a migrational movement of no small interest, though not a little overlooked by ordinary observers. Thus does the migration of birds progress, in spring and in autumn, across these northern shires, the phenomenon being very similar in its general aspects from year to year. Variety is, however, furnished in the numbers of the several species that so migrate, in the dates of their movements, and also in the occurrences of those abnormal migrants for which these shires have an exceptionally abundant share. We have not space here to chronicle the species that have paid these shires such abnormal visits, but the subject is certainly an interesting one and worthy of passing mention at least.

We propose now to devote the concluding pages of the present chapter to a brief résumé of the various ornithological events that so thickly dot the field-naturalist’s calendar, more especially as they relate to South Yorkshire. There is a great charm about the observation of these events, that from year to year take place in sequence that is as remarkable for its order as for its punctuality; a greater charm even in recording them season after season as the birds unfold their story with the passing months. For a dozen years or more we kept such a record, dealing more especially with the environs of Sheffield; season after season we noted the arrival and departure of the migratory species, the resumption and the cessation of song, the varying food from month to month, the pairing and nest-building, the rearing of the young; the flocking in autumn, the disbanding in spring, the habits of birds at nightfall, their awakening from slumber, their various local movements about the country-side, their actions generally in sunshine and in storm, by daylight and in darkness throughout each month, each week, each day, and not unfrequently each hour of the twenty-four. From a store of notebooks which has accumulated through these long years we will draw our information, that shall carry the story of the birds onwards in a cycle through the months from January to December.

The northern shires are not specially remarkable for avine song during the winter months, and here we have a deficiency that contrasts very strongly with that musical abundance of some of the southern counties. As Waterton remarked long ago, our three best-known perennial choristers are the Robin, the Wren, and the Hedge Accentor, of which trio the first is certainly the most persistent, as it is perhaps the sweetest and most musical, whilst the last is the least so. The Starling, however, is a very fair winter singer. The voice of the Missel-thrush is also heard throughout January, but now and then we have a day perhaps when he is silent, sure sign that music is on the wane. Towards the end of the month the Song Thrushes are back again in their accustomed haunts, and on exceptionally fine and sunny days may be heard to sing a little; the Blackbird, however, is invariably silent. Another irregular singer in January is the Sky-lark. It requires a warm and spring-like day indeed to woo him into voice, still his song must not be overlooked at this season. So far as most birds are concerned, January is a typical winter month. There are few signs among the birds here in South Yorkshire to indicate any change of seasons. At the end of the month Sparrows may be remarked at their old nests, and many Hedge Accentors undoubtedly pair at this time. The Titmice are still leading a nomad life; but the Rook and the Starling seldom fail to visit their nesting-places each morning. The Finches are of course still in flocks, but a rapid abrasion of the pale edges to the feathers is remarkable, sure sign that the nuptial period is now approaching. This is specially the case with Chaffinches and Bramblings: Greenfinches abrade later. Yellow Buntings are still in flocks upon the fields; the Meadow Pipit, yet gregarious, is upon the lowlands. The Moorhen, however, is about to pair; most other of our familiar birds are still displaying characteristics of their winter life.