Part 4

It is true that the female—and throughout this description I assume that the bird with much-worn plumage was of this sex—promptly left the stub at my approach; but when I retired to the undergrowth there was no tiresome wait of hours while the bird, flitting from bush to bush, chirped suspiciously, but almost immediately she returned to her home.^{27} The camera was examined, but clearly not considered dangerous, its tripod sometimes serving as a step to the nest entrance. The click of the shutter, however, when an exposure was made as the bird was about to enter its dwelling, caused some alarm, and she flew back to a neighboring tree, and for some time hopped restlessly from limb to limb.

The male, who had previously kept in the background, now approached, and, as if to soothe his troubled mate, thoughtfully gave her a caterpillar. She welcomed him with a gentle, tremulous fluttering of the wings—a motion similar to that made by young birds when begging for food. He, however, made what appeared to be precisely the same movements when she perched beside him.

[Illustration: 27. Chickadee at nest hole.]

It was not long before the female became so accustomed to the snap of the shutter that in order to prevent her from entering the nest I was forced to rush out from my hiding place; but at last, apparently becoming desperate, she succeeded in returning to her eggs in spite of my best efforts to prevent her.

There now ensued a very interesting change in the bird’s action. It will be remembered that at first she had left the nest on hearing me approach, while a light tap brought her through the opening with startling promptness. But now, evidently realizing that a return to her duties of incubation could be made only at great risk, she determined under no conditions to leave her eggs. In vain I rapped at her door and shook her dwelling to its foundations; no bird appeared, and not believing it possible that under the circumstances she would remain within the stub, I felt that she must have left without my knowledge, and therefore retired to await her reappearance.

[Illustration: 28. Chickadee at nest hole.]

At the end of several minutes the male, with food in his bill, advanced cautiously, and clinging to the rim of the nest opening, hung there a moment and departed minus the food. This was surprising. Could there be young in the nest? or was the bird, in imitation of the Hornbill, feeding his imprisoned mate? I rapped again, and this time, perhaps taken unawares, the female answered my question by appearing.

On June 3d a family arrived in the Chickadee villa, and both birds were found actively engaged in administering to its wants.

As a return for the inconvenience to which they had been subjected, a perch was erected by way of a step at their door. The female was appreciative and at once availed herself of this means of entering her home.^{28} The male, however, as before, was more wary. He had braved the camera to bring food to his mate, but his offspring had apparently not so strong a claim upon him. He would fly off in search of food and shortly return with a caterpillar, then perch quietly for several minutes a few yards from the nest, when, repelled by the camera and attracted by the food in his bill, he yielded to temptation, devoured the caterpillar, vigorously wiped his bill, at once started to forage for more food, and returned with it only to repeat his previous performance.

Occasionally he uttered a low whistle, addressed presumably to the female, and at times a _chickadee-dee-dee_, which I interpreted as a protest to me, and both notes were also uttered by the female.

The latter took so kindly to the doorstep that it was determined to give her a door, and to this end a leaf was pinned over the entrance to her home in such a manner that it swung to and fro, like the latch to a keyhole. This clearly did not meet with her approval, and at first she seemed puzzled to account for the apparent disappearance of the nest opening. But in less than a minute she solved the mystery, pushed the leaf to one side, and disappeared within.

Returning to the nest on June 12th, nothing was to be seen of either parent, and I feared that they or their offspring had fallen victims to the countless dangers which beset nesting birds and their young. Looking about for some clew to their fate, I found on the ground, near the nest stub, the worn tail-feathers of the female bird. The molting season had not yet arrived, nor would she have shed all these feathers at the same moment. There could therefore be only one interpretation of their presence. Some foe—probably a Sharp-shinned or Cooper’s Hawk, since the predaceous mammals for the most part hunt at night, when the Chickadee would be snugly sleeping in her nest—had made a dash and grasped her by the tail, which she had sacrificed in escaping. A moment later the theory was supported by the appearance of a subdued-looking Chickadee, _sans_ tail, and I congratulated her on her fortunate exchange of life for a member which of late had not been very decorative, and of which, in any event, Nature would have soon deprived her.

The young proved to be nearly ready to fly, and, carefully removing the front of their log cabin, a sight was disclosed such as mortal probably never beheld before and Chickadee but rarely.

Six black-and-white heads were raised and six yellow-lined mouths opened in expressive appeal for food. But this was not all; there was another layer of Chickadees below—how many it was impossible to say without disentangling a wad of birds so compact that the outlines of no one bird could be distinguished. A piazza, as it were, was built at the Chickadees’ threshold in the shape of a perch of proper size, and beneath, as a life net, was spread a piece of mosquito bar. Then I proceeded to individualize the ball of feathers; one, two, three, to seven were counted without undue surprise, but when an eighth and ninth were added, I marveled at the energy which had supplied so many mouths with food, and at the same time wondered how many caterpillars had been devoured by this one family of birds.

Not less remarkable than the number of young—and no book that I have consulted records so large a brood—was their condition. Not only did they all appear lusty, but they seemed to be about equally developed, the slight difference in strength and size which existed being easily attributable to a difference in age, some interval doubtless having elapsed between the hatching of the first and last egg.

[Illustration: 29. A Chickadee family.]

This fact would have been of interest had the birds inhabited an open nest, or a nest large enough for them all to have had an equal opportunity to receive food; but where only two thirds of their number could be seen from above at once, and where a very little neglect would have resulted fatally, it seems remarkable that one or more, failing to receive his share of food, had not been weakened in consequence and crushed to death by more fortunate members of the brood. Nor was their physical condition the only surprising thing about the members of this Chickadee family: each individual was as clean as though he had been reared in a nest alone, and an examination of the nest showed that it would have been passed as perfect by the most scrupulous sanitary inspector. It was composed of firmly padded rabbit’s fur, and, except for the sheaths worn off the growing feathers of the young birds, was absolutely clean. Later, I observed that the excreta of the young were inclosed in membranous sacs, which enabled the parents to readily remove them from the nest.

[Illustration: 30. A Chickadee family.]

The last bird having been placed in the net, I attempted to pose them in a row on the perch before their door. The task reminded me of almost forgotten efforts at building card houses, which, when nearly completed, would be brought to ruin by an ill-placed card. How many times each Chickadee tumbled or fluttered from his perch I can not say. The soft, elastic net, spread beneath them, preserved them from injury, and bird after bird was returned to his place so little worse for his fall that he was quite ready to try it again. Finally, eight birds were induced to take the positions assigned them; then, in assisting the ninth to his allotted place, the balance of a bird on either side would be disturbed, and down into the net they would go.

These difficulties, however, could be overcome, but not so the failure of the light at the critical time, making it necessary to expose with a wide open lens at the loss of a depth of focus.

The picture presented, therefore, does not do the subject justice. Nor can it tell of the pleasure with which each fledgeling for the first time stretched its wings and legs to their full extent, and preened its plumage with before unknown freedom.

At the same time they uttered a satisfied little _dee-dee-dee_, in quaint imitation of their elders. When I whistled their well-known _phe-be_ note, they were at once on the alert, and evidently expected to be fed.

The birds were within two or three days of leaving the nest, and, the sitting over, the problem came of returning the flock to a cavity barely two inches in diameter, the bottom of which was almost filled by one bird.

I at once confess a failure to restore anything like the condition in which they were found, and when the front of their dwelling was replaced, Chickadees were overflowing at the door. If their healthfulness had not belied the thought, I should have supposed it impossible for them to exist in such close quarters.

A few days later their home was deserted, and, as no other Chickadees were known to nest in the vicinity, I imagine them to compose a troop of birds which is sometimes found in the neighborhood.

THE LEAST BITTERN AND SOME OTHER REED INHABITANTS

My experience with the Least Bittern leaves the eerie little creature a half-solved mystery, and I think of it less as a bird than as a survivor of a former geological period, when birds still showed traits of their not distant reptilian ancestors.

The Bittern’s home is in fresh-water, cat-tail marshes, and he wanders at will through the thickly set forest of reeds without of necessity putting foot to the water below or flapping wing in the air above. His peculiar mode of progression constitutes one of his chief characteristics. The reeds in which he lives generally grow in several feet of water, far too deep, therefore, to permit of his wading; while his secretive disposition makes him averse to appearing in the open, except after nightfall. It is impossible to fly through the cat-tails, and so the bird walks and even runs through them, stepping from stem to stem with surprising agility. I had heard of this habit, but the description conveyed as little idea of the bird’s appearance as it is feared this one will, and when for the first time a Least Bittern was seen striding off through the reeds about three feet above the water, the performance was so entirely unlike anything I had ever seen a bird do before, I marveled that his acrobatic powers had not made him famous.

The feathered gymnast’s slender body—or perhaps one should say neck, for the bird is chiefly neck and head—seemed to be mounted on long stilts, with the aid of which he waded rapidly through the water, his head shooting in and out at each stride.

The Least Bittern’s notes appear to be less known than his habits. Nuttall, that exceptionally keen-eared bird student, was familiar with them, but most writers have restricted themselves to the statement that, when flushed, the bird utters a low _qua_, while some have even said he was voiceless.

I should not be in the least surprised to learn that this uncanny inhabitant of the reeds had a call fully as remarkable as the vocal performance of his large relative, the American Bittern, but thus far in my slight acquaintance with him he has been heard to utter only four notes: A soft, low _coo_, slowly repeated five or six times, and which is probably the love song of the male; an explosive alarm note, _quoh_; a hissing _hah_, with which the bird threatens a disturber of its nest; and a low _tut-tut-tut_, apparently a protest against the same kind of intrusion.

[Illustration: 31. Least Bittern’s nesting site, showing reeds bent over nest. One of four eggs can be seen.]

It was the markedly dovelike _coo_ which first introduced me to this species. With William Brewster I was at the Fresh Pond marshes, listening for the repetition of some strange calls which had excited the curiosity of Cambridge ornithologists, and which proved to belong to a Florida Gallinule,[B] when we heard the soft notes of a Least Bittern, who soon rose from the marsh near by. A few days later the Bittern was found in full song—if the _coo_ be its song—in the marshes of Presque Isle in Erie Bay; but it must be confessed that a desire to secure specimens of this, to me, strange bird left no opportunity to study its habits, and the species was not again observed until June, 1898, in the northern part of Cayuga County, New York. Here, under the guidance of an observing local ornithologist, Mr. E. G. Tabor, an encounter was had with a Least Bittern which made a unique page in my experience as a bird student.

Footnote B:

See Brewster, Auk, vol. viii, 1891, p. 1.

It was on the border of Otter Lake, where the Least Bitterns nest in small numbers in low bushes, or a mass of drift, or more often in the fringe of cat-tails. The trail of a boat through the reeds and empty nests, which before had held from three to five eggs, marked the ill-directed work of the boy oölogists whose misspent zeal has resulted in such a vast accumulation of eggshells and such an absence of information about the birds that laid them. A visit to a more distant part of the lake, where even thus early in the year the cat-tails were five feet above water of over half that depth, saved the day, as far as Least Bitterns were concerned. Paddling close to the reeds, a practiced eye could distinguish the site of a Bittern’s nest, when the nest itself was invisible, by the bowed tips of the reeds which the bird invariably bends over it.^{31} The object of this habit is perhaps to aid in concealing the eggs from an enemy passing overhead—a Crow, for example—an attack by boat evidently not being taken into consideration.

Certainly our appearance was in the nature of a surprise to a pair of birds who had just completed their platformlike nest and were apparently discussing future steps in their domestic affairs.

[Illustration: 32. Least Bittern’s nest; reeds parted to show eggs.]

As we approached, the female, who even before the eggs are laid seems to have the home love more strongly developed than the male, bravely stuck to her post, while the male marched off through the reeds in the manner which has been described as so remarkable. When he paused, with either foot grasping reeds several inches apart or clung to a single stalk with both feet, he resembled a gigantic, tailless Marsh Wren.

[Illustration: 33. Least Bittern on nest mimicking its surroundings.]

The actions of the female were interesting in the extreme. Her first move was an attempt at concealment through protective mimicry—a rare device among birds. Stretching her neck to the utmost, she pointed her bill to the zenith, the brownish marks on the feathers of the throat became lines which, separated by the white spaces between them, might easily have passed for dried reeds, and the bird’s statuelike pose, when almost within reach, evinced her belief in her own invisibility.^{33, 34}

The pose recalled Hudson’s experience with a wounded Least Bittern (_Ardetta involucris_, a near relative of our bird) in the marshes of La Plata, where a bird at his feet, in the same position as the one before me, was discovered only after careful search, and which, to the naturalist’s amazement, slowly revolved as he walked around it, with the presumable object of keeping its protectively colored breast turned toward him.

[Illustration: 34. Least Bittern on nest mimicking its surroundings.]

My bird, however, was among fresh reeds, and while one can not doubt the effectiveness of its attitude and color, when seen among dead reeds or grasses, neither were of value among its green surroundings.

With the light on the wrong side and the reeds swaying violently in the wind, we essayed to picture the bird, and the best of several attempts made under these adverse conditions are here given.

Covering my hand with my cap I held it toward her, when, convinced that her little trick had failed, she adopted new tactics, and struck at me with force and rapidity, which made me thankful that my hand was protected. Her bright yellow eyes glared with the intensity of a snake’s, and her reptilelike appearance was increased by the length and slenderness of her head and neck. Her courage was admirable; she not only displayed no fear, but was actually aggressive, and with a hissing _hah_ struck viciously at my hand each time it was placed near the nest. As I quickly retreated on each occasion, and at length made no further move toward her, she decided to withdraw, perhaps to join her cautious mate, who from the reeds had been uttering a warning _tut-tut-tut_ at intervals. Very slowly and watchfully she left the nest, and when she had advanced a few feet through the reeds I again ventured to touch her platform home, putting my hand, however, under it; but the motion instantly attracted her attention, and, darting back to her post, she was on guard in a moment. Then I left her, retiring from the field fairly vanquished in my first hand-to-bill encounter with a wild bird. I hope she laid a full complement of five eggs and from them reared five birds worthy representatives of their mother.

A desire to renew my acquaintance with—or perhaps I should say advances toward—this unbirdlike feathered biped, and to meet it under conditions more favorable for the camera hunter, brought me the following year (June 17, 1899), to the Montezuma marshes at the head of Cayuga Lake. Here are endless forests of cat-tails in which dwell not only Bitterns, Long-billed Marsh Wrens, and Red-winged Blackbirds, but also numbers of Pied-billed Grebes and Florida Gallinules.

There is a mystery about a marsh akin to that which impresses one in a primeval forest. The possibilities of both seem limitless. One hears so much and sees so little. Birds calling from a distance of only a few yards may remain long unidentified. A rustling in the reeds arouses vague expectations.

The notes of marsh-inhabiting birds are in keeping with the character of their haunts. They are distinctly wild and strange, and often thrilling. The Rails, for example, all have singular, loud, startling calls. The American Bittern is a famous marsh songster, but although several of his common names are based on his calls, it is only recently that he has actually been seen uttering them. The Gallinule resembles the hen in the character, volume, and variety of its notes, and to it and not the Clapper Rail should be given the name “Marsh Hen.” Indeed, its European relative, from which it can scarcely be distinguished, is known as the Moor Hen or Water Hen.

But of all this marsh music none to my ear is more singular than the call of the Pied-billed Grebe. It is mentioned in few books, and has won the bird no such fame as the Loon’s maniacal laughter has brought him, though as a vocalist the Grebe fairly rivals his large cousin. Like most bird calls it is indescribable, but perhaps sufficient idea of its character may be given to lead to its identification when heard. It is very loud and sonorous, with a cuckoolike quality, and may be written _cow-cow-cow-cow-cow-cow-cow-cow-cow-uh, cow-uh, cow-uh, cow-uh_. These notes vary in number, and are sometimes followed by prolonged wailing _cows_ or _ohs_ almost human in their expressiveness of pain, fear, and anguish.

This is the love song of the male, and when he has won a mate she joins him in singing, uttering, as he calls, a rapid _cuk-cuk-cuk_, followed by a slower _ugh, ugh, ugh, ugh_.

The Gallinules were cackling in the reeds, where a nest with three hatching eggs was found, but not a bird was seen. Red-winged Blackbirds were chattering with excitement as they guided the first wing strokes of their young, who perched on the reeds begged eloquently for food rather than for lessons in flying.^{35}

[Illustration: 35. Young Red-winged Blackbirds.]

In a small island of cat-tails a pair of Grebes was calling, and after the most careful stalking my companion saw the female respond to the voice of her mate.

It was in this island—if a patch of cat-tails growing in three feet of water can be called an island—that we found the first two of numerous Least Bitterns’ nests, and here our camera studies were made. These nests were typical in form and site; one contained five and the other four^{32} eggs, from which the birds had apparently departed as we pushed our boat toward them.

Less than twenty minutes later we again passed these nests and found, to our surprise, that in one all four, and in the other two eggs had been punctured, as if by an awl. Here was a mystery which my companion, who was examining the second nest while I was studying the first, quickly solved by seeing a Long-billed Marsh Wren actually make an attack on the remaining three eggs, and a little later a bird of the same species—perhaps the same individual, since the Bitterns’ nests were not more than twenty yards apart—visited the first nest to complete its work on the five already ruined eggs.

Our attempt to photograph the energetic little marauder failed, nor did we succeed in learning the real cause of its remarkable destructiveness. However, the fact that in one nest alone it drove its needlelike bill into all five eggs without pausing to feast on their contents, would imply that it was not prompted by hunger, and, much against our will, we were forced to attribute the bird’s actions to pure viciousness; though, it is true, there may have been another side to the story, in which the Bittern was the culprit.

The owners of the four eggs did not return while we were present, and the following day we found their nest empty—a mute protest against fate.

[Illustration: 36. Least Bittern eating her eggs.]

The female of the second nest discovered, in which only two of the five eggs had been injured, proved to be a bird of character.

[Illustration: 37. Least Bittern on nest.]