My Tropic Isle, Edmund James Banfield [10 ebook reader .txt] 📗

is fairly smooth and regular with an inclination of about thirty degrees) was studded with nests. Fifty-three were placed irregularly about the middle of the roof, some in pairs, none on the walls. Some were not quite finished; twenty contained a single white egg each; none contained young. All were adherent to the stone by a semi-transparent white substance resembling isinglass, with which also the fine grass, moss, and fibre composing the nests were consolidated. The vegetable material of the first fragmentary nest (found September 17, 1908) was quite green and the gluten moist and sticky. Those now described (two months later) were dry and tough, the dimensions being 2 to 21 inches across and about 3 inch deep. The cave is only about 30 feet above high-water mark and the entrance the birds favour is, strange to say, averse from the sea and much obscured by leafage.

After the first fright the birds became quiet and confident. A young one flew into my half-closed hand, and I detained it for a while and it never struggled. Another tried to snoodle into the shirt-pocket of the black boy who accompanied me. Several brushed against our faces. Clouds partially obscured the sun and what with the screen of foliage and the prevailing gloom of the cave we could not always distinguish the nests. When the sun shone brightly all were plainly discernible, those with the single pearly egg being quaintly pretty. As they flitted in and out of the cave, the birds were as noiseless as butterflies save when they wheeled to avoid each other. Those which were brooding, as they flitted over the nests or clung to the edges, uttering a peculiar note hard to vocalise. To my cars it sounded as a blending of cheeping, clinking, and chattering, yet metallic, and not very unlike the hasty winding up of a clock.

One bird flew to her nest a foot or so from my face and clung to it. To test its timidity or otherwise I approached my face to within two inches, but she continued to scrutinise me even at such close quarters with charming assurance. Then I gently placed my hand over her. She struggled. but not wildly, for a few seconds and then remained passive with bright eyes glinting in the gloom. She was a dusky little creature, the primaries, the back of the head, neck, the shoulders, and tail being black, but when the wings were extended the grey fluff of the base of the tail was conspicuous. After a few minutes I put her back on the nest, and she clung, to it having no shyness or fear. I noticed that the beak was very short, the gape very large, the legs dwarfed, and the toes slender.

We remained in the cave for about half an hour, during which time the birds came and went indifferent to our presence. As far as I am aware members of the species never rest save in their headquarters, clinging to the roof or the nests and never utter a sound except the reassuring, prattle upon alighting on the edge of the nest. It was interesting to note that while many young birds were fluttering about in the cave none occupied a nest, and eggs were in successive stages of incubation, as proved by appearance and test.

The fact that the nests of these swifts are cemented with coagulated saliva establishes analogy with that other member of the family which builds in the caves of frowning precipices near the sea, making edible nests greatly appreciated by Chinese gourmands, some of whom maintain the fantastic theory that the swift catches quantities of a small, delicately flavoured fish which it exposes on rocks until desiccated, to be afterwards compounded into nests. The ancients were wont to believe in the existence of hostile mutuality between the swifts and the beche-de-mer, though they have little in common in respect of appearance, attributes, and habits. If memory serves, one of the genera had the specific title of HIRUNDO, founded on the faith that the swift, by flying over the sea-slug exposed by receding tide, and vexing it by jeers, caused it to exude glutinous threads which the swift seized and bore away to its cave to be consolidated and moulded into a nest. To the fable was appended a retributive moral, viz., that the beche-de-mer occasionally revenged itself by expelling such a complicated mass of gluten that it became a net for the capture of the swift, which was slowly assimilated by its enemy. The Chinese, it may be said, with but slight perversion of fact, show equal partiality for the respective emblems of speed and sloth.

Since the dates mentioned it has been ascertained by personal observation that the breeding season of the swiftlet extends over four months, during which probably four young are reared, each clutch being single. The nests do not provide accommodation for more than one chick, which before flight is obviously top large for its birthplace. Looking down into the cave, the eggs well advanced towards incubation seem to have a slight phosphorescent glow. The earliest date so far recorded of the discovery of a newly laid egg is October 14th, but there is reason to believe that the breeding season begins at least a month earlier. On January 10th this year (1910) half the nests in the cave originally described contained eggs, in most of which (judging by opacity) incubation was far advanced, while in several were young birds, some newly hatched, others apparently ready to depart from their gloomy, foul-smelling quarters. These latter clung so determinedly to their nests with needle-like toes that the force necessary to remove them would certainly have caused injury.

It may be remarked that the breeding season of the nutmeg pigeon is also protracted over a third of the year--from September to the end of January, two or three single successive clutches being reared. The pigeon is a visitor, the swift a resident.


II. THREE FISHERS

At the outset it is almost incumbent to announce that this is not a fish story. It is not even a story, though fish play a secondary part in it. Therefore it should not make shipwreck of the faith of those who smile and sniff whensoever a fish or a snake is informally introduced in print. The imagination of some observers of the wonders of natural history paints incidents so extravagantly that their illustrative value is depreciated if not entirely distorted.

As I would wish to establish a sort of general confidence with any chance reader of these lines who, like myself, finds no need for exaggeration in the chronicling of observations, being well aware that Nature with the ease of consummate art outwits the wisest and laughs at the blotches of the boldest impressionist, it seems but common politeness to explain that though the Island may be romantic, the art of romancing is alien from its shores, albeit (as some one has hinted) that in imagination reverently applied lies the higher truth.

The distance from the mainland is not so great as to deprive the Island of generally distinctly Australian characteristics. It was, no doubt, in the remote past, merely a steep and high range of hills separated from other hills and mountains by plains and lagoons. Delicate land shells, salt-hating frogs, and subtle snakes are among the living testifiers to past connection with Australia, but while all the animals and nearly all the birds native to the island are common on the mainland, several mainland types are conspicuously absent.

If, therefore, the birds and mammals seem in these literal chronicles to have little ways of their own, may they not owe obedience to true and abiding circumstances--a kind of unavoidable fate--due to isolation? It would indeed be singular if an island so long separated from Australia as to possess no marsupial did not impress certain idiosyncrasies upon its fauna and flora. It would be absurd to contend that as a rule, the untamed creatures carry any marks of distinction, but I have had the opportunity of studying facts of which I have never been fortunate to have confirmation either by reading or by "swapping lies" with other students of Nature.

Occasionally when bewilderment has come I call to mind what Mrs. Jarley said of her waxwork, and let the case pass: "I won't go so far as to say that, as it is, I've seen waxwork quite like life but I've certainly seen some life that was exactly like waxwork." When I see a crab not easily distinguishable from a piece of sponge and a piece of sponge far more like a crab generally than the crab, that unconsciously mimics it, and possessing just as much apparent animation, I am content to be tricked in many other ways by the good mother of us all.

Having ventured so far by way of preface, it is quite possible that the reader may have concluded that something exceptionally marvellous is to follow. Disappointment was inevitable from the first. The relation of some of the quaint distinguishing traits of the Island fauna must be left until the historian imagines that he has established a reputation for subduing, rather than heightening, the tone of his facts. This introduction has not a particular but a wide bearing.

Chief among the birds of prey are the osprey, the white-headed sea-eagle, and the white-bellied sea-eagle. The great wedge-tailed eagle (eagle-hawk) is a rare visitor, and is not a fisher. The others are resident and are industrious practisers of the art which, according to their interpretation, is anything but gentle. As they indulge in it, the sport is so rough and boisterous and clumsy that one wonders that so many fish should be caught. Each soars over the sea in circles at a height of about 60 feet or 80 feet, and when fish are seen flies down and, plunging into the water, seizes its prey with its talons. Unless the bird is watched closely its attitudes while preparing for the downward cast and during the descent are misunderstood. "And like a thunderbolt he falls" is quite, according to local observations, an erroneous description of the feat performed by the fishing eagle. Take as an example of the others the actions of the noble bird the white-headed sea-eagle. As it circles over the blue water its gaze is fixed and intent. Flight seems automatic--steady, fairly swift, rippleless. Immediately a fish is sighted, attitudes and poses become comparatively strained and awkward. Flight is checked by the enormous brake-power of outspread tail, and backward beating wing. The eagle poises over the spot, stretches out its legs, and extends its talons to the utmost; flies down in a series of zig-zags, and with the facial expression of the dirty boy undergoing the torture of face-washing, plunges breast first with outstretched wings with a mighty splash into the water. Disappearing for four or five seconds, it finds it no easy task to rise with a two-pound mullet.

Splendid as the feat undoubtedly is, it does not coincide with the description usually given. Have we not often been told of the headlong, lightning like drop that almost baffles eyesight? The circumstance that baffles is that fish are so unobservant or so slow that they do not always, in place of sometimes, escape. For the excuse of the fish it must be acknowledged that very few members of the tribe are fitted with eyes for star-gazing. The eagle captures a dinner, not by the exercise of any very remarkable fleetness or adaptiveness or passion for fishing, but because of certain physical limitations on the part of the fish.


"As is the osprey to the fish, who takes it
By sovereignty of nature."


The subserviency of fish to the osprey was noted by the