It is amusing to stand and listen to the two voices going on at the same time; the Sedge-bird rattling along in a state of the intensest excitement, pitching up his voice into a series of loud squeaks, and then dropping it into a long-drawn grating noise, like the winding-up of an old-fashioned watch, while the Reed-warbler, unaffected by all this volubility, takes his own line in a continued prattle of gentle content and self-sufficiency.
These eight birds, then, are the warblers which at present visit Oxford. Longer walks and careful observation may no doubt bring us across at least two others, the Wood-warbler and the Grasshopper-warbler: the nest of the Wood-warbler has been found within three miles. Another bird, too, which is often called a warbler, has of late become very common both in and about Oxford—the Redstart. Four or five years ago they were getting quite rare; but this year (1885) the flicker of the red tail is to be seen all along the Cherwell, in the Broad Walk, where they build in holes of the elms, in Port Meadow, where I have heard the gentle warbling song from the telegraph wires, and doubtless in most gardens. The Redstart is so extremely beautiful in summer, his song so tender and sweet, and all his ways so gentle and trustful, that if he were as common, and stayed with us all the year, he would certainly put our Robin’s popularity to the proof. Nesting in our garden, or even on the very wall of our house, and making his presence there obvious by his brilliant colouring and his fearless domesticity, he might become, like his plainer cousin of the continent, the favourite of the peasant, who looks to his arrival in spring as the sign of a better time approaching. “I hardly hoped,” writes my old Oberland guide to me, after an illness in the winter, “to see the flowers again, or hear the little Röthel (Black Redstart) under my eaves.”
The Oxford Redstarts find convenient holes for their nests in the pollard willows which line the banks of the Cherwell and the many arms of the Isis. The same unvaried and unnatural form of tree, which looks so dreary and ghastly in the waste of winter flood, is full of comfort and adaptability for the bird in summer. The works of man, though not always beautiful, are almost always turned to account by the birds, and by many kinds preferred to the solitude of wilder haunts. Whether he builds houses, or constructs railways, or digs ditches, or forces trees into an unnatural shape, they are ready to take advantage of every chance he gives them. Only when the air is poisoned by smoke and drainage, and vegetation retreats before the approach of slums, do they leave their natural friends to live without the charm of their voices—all but that strange parasite of mankind, the Sparrow. He, growing sootier every year, and doing his useful dirty work with untiring diligence and appetite, lives on his noisy and quarrelsome life even in the very heart of London.
Whether the surroundings of the Oxford Sparrows have given them a sense of higher things, I cannot say; but they have ways which have suggested to me that the Sparrow must at some period of his existence have fallen from a higher state, of which some individuals have a Platonic ἀνάμνησις which prompts them to purer walks of life. No sooner does the summer begin to bring out the flies among our pollard willows, than they become alive with Sparrows. There you may see them, as you repose on one of the comfortable seats on the brink of the Cherwell in the Parks, catching flies in the air with a vigour and address which in the course of a few hundred years might almost develop into elegance. Again and again I have had to turn my glass upon a bird to see if it could really be a Sparrow that was fluttering in the air over the water with an activity apparently meant to rival that of the little Fly-catcher, who sits on a bough at hand, and occasionally performs the same feat with native lightness and deftness. But these are for the most part young Sparrows of the year, who have been brought here perhaps by their parents to be out of the way of cats, and for the benefit of country air and an easily-digested insect diet. How long they stay here I do not know; but before our Autumn Term begins they must have migrated back to the city, for I seldom or never see them in the willows except in the Summer Term.
These seats by the Cherwell are excellent stations for observation. Swallows, Martins, and Sand-martins flit over the water; Swifts scream overhead towards evening; Greenfinches trill gently in the trees, or utter that curious lengthened sound which is something between the bleat of a lamb and the snore of a light sleeper; the Yellow Wagtail, lately arrived, walks before you on the path, looking for materials for a nest near the water’s edge; the Fly-catcher, latest arrival of all, is perched in silence on the railing, darting now and then into the air for flies; the Corn-crake sounds from his security beyond the Cherwell, and a solitary Nightingale, soon to be driven away by dogs and boats and bathers, may startle you with a burst of song from the neighbouring thicket.
Of the birds just mentioned, the Swifts, Swallows, and Martins build, I need hardly say, in human habitations, the Sand-martins in some sand- or gravel-pit, occasionally far away from the river. The largest colony of these little brown birds, so characteristic of our Oxford summer, is in a large sand-pit on Foxcombe Hill: there, last July, I chanced to see the fledgelings peeping out of their holes into the wide world, like children gazing from a nursery window. The destruction all these species cause among the flies which swarm round Oxford must be enormous. One day a Martin dropped a cargo of flies out of its mouth on to my hat, just as it was about to be distributed to the nestlings; a magnifying glass revealed a countless mass of tiny insects, some still alive and struggling. One little wasp-like creature disengaged himself from the rest, and crawled down my hand, escaping literally from the very jaws of death.
Before I leave these birds of summer, let me record the fact that last June (1886) a pair of swallows built their nest on the circular spring of a bell just over a doorway behind the University Museum; the bell was constantly being rung, and the nest was not unfrequently examined, but they brought up their young successfully. This should be reassuring to those who believe that the Museum and its authorities are a terror to living animals.
Nest on College Bell.