The sharp touch of winter in October has changed the whole face of things. Cold and wind and wet have set their mark alike on woodland and on garden border. Everywhere there is change. The birds of summer have all left us. No bee or wasp is stirring. In this pallid sunshine are no gnats to poise in cloudy column. No moths hover on quivering wings among the ruined flowers. Of the shy four-footed creatures of whose lives we know so little, some are still broad awake and busy, caring nothing for the cold; but some have already entered on their winter sleep. The dormouse is rolled in his snug ball of moss, the hedgehog is buried in his bed of leaves. Grass-snake and viper have crawled away into warm hiding places in banks or among the roots of trees. The frog has buried himself in his cold bed of mud at the bottom of the pond. The toad has squeezed his burly figure into a hole in a tree stump, or under some sheltering stone. It is the fondness of the toad for hiding in holes and corners—not only in winter, but to some extent all the year—which has given rise to so many marvellous tales of the discovery of toads in the heart of trees or in solid blocks of marble. Toads may often be found in holes. But never yet was one found living in any cavity whatsoever where there was no communication with the outer world, no chink through which insects might make their way after the manner of the fly into the parlour of the spider.
Long before the frosts of October, and while the weather was still warm and sunny, snails were to be seen collected in hundreds on the fences of fields and lanes—on their way, no doubt, to winter quarters. Though whether they expected to find suitable lodgings up there at the tops of the palings, or whether they were only sunning themselves for the last time before crawling down to earth to bury themselves in the holes into which the posts were driven, is perhaps less clear.
Some few snails are provided already with close-fitting doors. Others will seal up their gates with a temporary barricade, behind which they will sleep until the trumpet-call of spring shall break on their dull senses. Do they dream, these snails? Do visions of plump cabbages and brilliant dahlias flit through their molluscous minds? Do they in slumber enjoy again the midnight raid upon the marrow-bed, or cry havoc on the choicest lilies of the garden?
There is a strange stillness in the woods these autumn days; a mournful silence, as of regret for the lost summer. The birds are quiet; the insects, whose life and beauty lent so much to the brightness of the summer, are dying in the sharpening air, or are creeping away to hide themselves for the winter. October is a fatal month for the lower forms of life. The different species of our native insects are numbered by tens of thousands, and of the myriads of these with which the air of August, and even of September, teemed, only a few, a very few, will survive the chillier dawns and sunsets of this month, which marks the limit of their lives. At the best their lives are brief. The lives of insects, in their perfect condition, are more often numbered only by months, or even weeks: while the little sad-coloured stone-flies that haunt the banks of streams, entering on their last stage without mouths, spend only a few days of strange existence; and there are other flies which, born after sunset and dying before sunrise, never see the full light of day at all.
Those insects which survive the winter do so as a rule by retiring into the shelter of buildings, into crevices in walls, or into hollow trees, and there remaining, motionless and apparently lifeless, all through the cold season, coming out again at the return of spring. Some butterflies are especially fond of taking up their quarters for the winter in the roofs of houses; and the cornices of unoccupied rooms seem particularly favourite resting-places. There is a case on record in which a Small Tortoiseshell butterfly, having entered a church during service-time one Sunday in August, settled calmly on a rafter over the heads of the congregation, closed its wings, and then and there took up its quarters for the season. It was happily beyond the reach of the verger's broom, though under the eyes of the clergyman,—himself a naturalist, and there it hung, week after week, all the winter through. At length, on a warm Sunday in May, after a sleep of just nine months' duration, the little creature opened its wings again and fluttered down from its perch, "apparently as fresh in colour and condition as if just out of the chrysalis".
In the same way another of the race flew into a sitting-room in a little country town, one day during the hot weather of September, and finally established itself in the cornice, where for six long months it hung motionless. One fine morning in the following March it was fluttering at the window. The sash was lifted. The little creature dashed out into the sunshine, almost with the speed of a swallow.
A striking feature of the autumn garden some years is the multitude of sober-coloured moths hovering among the flower-beds, morning, noon, and night. The moths themselves not only do no harm in the garden, but are of no small service to the gardener by carrying pollen on their tufted heads from flower to flower, and thus unconsciously fertilising many a blossom that might otherwise have borne no seed at all. But it is quite otherwise with the caterpillars, insignificant but noxious little grubs, which, in some seasons, appear in such hosts as to devastate whole fields. In Germany it has been found necessary to use a machine, drawn by horses, to sweep up these caterpillars, which are collected from it in sacks and then destroyed.
The perfect insect, the commonest perhaps of all the moths, is a beautiful little creature, though there is nothing striking in its colouring. It is known as the "Silver Y," from a conspicuous mark on each of its front wings. Its scientific name of "Gamma" has been given to it from another and more learned reading of the letter.
It has been found very difficult to bestow a rational English "popular name" on each of the two thousand species of moths that inhabit these islands. Some of the names, indeed, appear almost, if not quite, meaningless, while some, on the other hand, are highly appropriate. The Humming-bird Hawk moth is marvellously like the bird whose name it bears, as every one must admit who watches it poise with outstretched trunk before a flower, on wings that move so swiftly that they show like a halo round it. Two other Hawk moths are called Elephants, but this is because of the strange-looking head of the caterpillar, which can be extended like a sort of dwarf proboscis. Another moth, the Death's Head, bears a skull and cross-bones on its back.
The moths of the large class known as Geometers are so called because the caterpillars, as they loop themselves along, have the air of measuring the space they traverse, as a man might span it with his hand. The Tiger is a moth of brilliant colouring. The Widow and the Old Lady are clad in sombre hues. The Quakers are mostly dressed in soft shades of sober brown, while the sixteen varieties of Footmen wear among them almost as many varieties of livery.