Small birds swarmed, as I have already stated, in every ploughed field. All the birdcatchers in London with traps and nets and limed twigs could never make the slightest appreciable difference to such flocks. I have always expressed my detestation of the birdcatcher; but it is founded on other grounds, and not from any fear of the diminution of numbers only. Where the birdcatcher does inflict irretrievable injury is in this way—a bird, say a nightingale, say a goldfinch, has had a nest for years in the corner of a garden, or an apple-tree in an orchard. The birdcatcher presently decoys one or other of these, and thenceforward the spot is deserted. The song is heard no more; the nest never again rebuilt.
The first spring I resided in Surrey I was fairly astonished and delighted at the bird life which proclaimed itself everywhere. The bevies of chiffchaffs and willow wrens which came to the thickets in the furze, the chorus of thrushes and blackbirds, the chaffinches in the elms, the greenfinches in the hedges, wood-pigeons and turtle-doves in the copses, tree-pipits about the oaks in the cornfields; every bush, every tree, almost every clod, for the larks were so many, seemed to have its songster. As for nightingales, I never knew so many in the most secluded country.
There are more round about London than in all the woodlands I used to ramble through. When people go into the country they really leave the birds behind them. It was the same, I found, after longer observation, with birds perhaps less widely known as with those universally recognised—such, for instance, as shrikes. The winter when the cry was raised that there were no birds, that the blackbirds and thrushes had left the lawns and must be dead, and how wicked it would be to take a nest next year, I had not the least, difficulty in finding plenty of them.
They had simply gone to the water meadows, the brooks, and moist places generally. Every locality where running water kept the ground moist and permitted of movement among the creeping things which form these birds' food, was naturally resorted to. Thrushes and blackbirds, although they do not pack—that is, regularly fly in flocks—undoubtedly migrate when pressed by weather.
They are well known to arrive on the east coast from Norway in numbers as the cold increases. I see no reason why we may not suppose that in very severe and continued frost the thrushes and blackbirds round London fly westwards towards the milder side of the island. It seems to me that when, some years since, I used to stroll round the water meadows in a western county for snipes in frosty weather, the hedges were full of thrushes and blackbirds—quite full of them.
Now, though there were thrushes and blackbirds about the brooks by London last winter, there were few in the hedges generally. Had they, then, flown westwards? It is my belief that they had. They had left the hard-bound ground about London for the softer and moister lands farther west. They had crossed the rain-line. When frost prevents access to food in the east, thrushes and blackbirds move westwards, just as the fieldfares and redwings do.
That the fieldfares and redwings do so I can say with confidence, because, as they move in large flocks, there is no difficulty in tracing the direction in which they are going. They all went west when the severe weather began. On the southern side of London, at least in the districts I am best acquainted with, there was hardly a fieldfare or redwing to be seen for weeks and even months. Towards spring they came back, flying east for Norway. As thrushes and blackbirds move singly, and not with concerted action, their motions cannot be determined with such precision, but all the facts are in favour of the belief that they also went west.
That they were killed by the frost and snow I utterly refuse to credit. Some few, no doubt, were—I saw some greatly enfeebled by starvation—but not the mass. If so many had been destroyed their bodies must have been seen when there was no foliage to hide them, and no insects to quickly play the scavenger as in summer. Some were killed by cats; a few perhaps by rats, for in sharp winters they go down into the ditches, and I saw a dead redwing, torn and disfigured, at the mouth of a drain during the snow, where it might have been fastened on by a rat. But it is quite improbable that thousands died as was supposed.
Thrushes and blackbirds are not like rooks. Rooks are so bound by tradition and habit that they very rarely quit the locality where they were reared. Their whole lives are spent in the neighbourhood of the nest, trees, and the woods where they sleep. They may travel miles during the day, but they always come back to roost. These are the birds that suffer the most during long frosts and snows. Unable to break the chain that binds them to one spot, they die rather than desert it. A miserable time, indeed, they had of it that winter, but I never heard that any one proposed feeding the rooks, the very birds that wanted it most.
Swallows, again, were declared by many to be fewer. It is not at all unlikely that they were fewer. The wet season was unfavourable to them; still a good deal of the supposed absence of swallows may be through the observer not looking for them in the right place. If not wheeling in the sky, look for them over the water, the river, or great ponds; if not there, look along the moist fields or shady woodland meadows. They vary their haunts with the state of the atmosphere, which causes insects to be more numerous in one place at one time, and presently in another.