Read Ebook: The Auk: A Quarterly Journal of Ornithology Vol. XXXVI APRIL 1919 No. 2 by Various Stone Witmer Editor

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I waded to the spot whence this bird had taken flight and presently saw the water agitated by some small creature beneath the surface. It was one of the diminutive downy Grebes, floating submerged, head downward, with its forward parts thrust into a mass of filamentous vegetation , while its legs, stretched to their full extent posteriorly, were pointed vertically upward toward the surface of the water. I easily took it up in my hand.

On the evening of July 22, the two eggs were cold and had not been disturbed since my previous visit, at which time their positions had been carefully noted. However one of them was "pipped" and I could distinctly hear the voice of the bird within the shell. A search for the parent Grebes was without avail. A faint voice, at the other side of the water, was detected and was followed several times, but when its author was finally located it proved to be not a Grebe but a recently hatched Sora Rail.

The next morning, although the sun shone upon the nest, the eggs were cold and the fetuses in both of them were dead. No birds were seen. My last visit, on the evening of July 24, yielded no further result. But I noted now, that there was no water around the nest. It was stranded upon a mud-bar. This was undoubtedly the cause of forced abandonment of the nest. The Grebes were unable to reach it by a water route, and no other mode of travel was possible to them. A search around the water area, now very small and shallow, gave no further evidence. The Grebes were never seen again.

In reviewing the account of these observations certain groups of data suggest themselves for summarization:

It is interesting to note that only six days elapsed between the removal of the first set of eggs and the deposition of the first egg in a new nest.

The period of incubation is twenty-four or twenty-five days, as shown in the following table of dates, noted at the second nest:

It will be observed that the fourth egg was alive and on the point of hatching, twenty-eight days after it was deposited, but this cannot be considered normal, since the egg had been deprived of the parent heat for several days. It seems remarkable that the fetus survived the cool nights.

The change of color which these eggs undergo, is also worthy of note. I do not refer to the nest-stains caused by contact with the fermenting vegetation of the nest lining, but to a uniform color change of the surface layer of the shell, which is brought about presumably by exposure to light and atmosphere. Referring to the eggs of the second nest by numbers it will be noted that egg number two, when first observed at 7:30 A. M., had apparently just been deposited. As previously stated, its color was a very delicate bluish-green. Egg number one had already attained its final color; a sort of drab-tinted buff, which rendered it less conspicuous in the nest. Twenty-four hours later, egg number two had changed to the same color as egg number one. No data were recorded for egg number three in this respect. Egg number four, after thirty-six hours, was "nearly but not quite the same color as the others." After it had been in the nest forty-eight hours it was noted as, "same color as other eggs." But egg number five could scarcely be recorded as fully changed after eighty-four hours had elapsed. These notes would seem to indicate that the first-laid eggs change color more rapidly than the later ones. It may be noted in this connection that the first eggs are slightly richer in the light green pigment; possibly, also, they receive less shelter from the parent bird than the later eggs.

The usual vocal performance of these Grebes, so far as I was able to determine, is a sort of "ko-wee, ko-wee," repeated at regular intervals. It might be compared to the squeak of a dry wheelbarrow producing one double squeak at each revolution of the wheel. It is however of a clearer quality than this comparison might indicate. Each "ko-wee" has rising inflection and its two syllables are run closely together, with the accent on the last syllable.

The remarkable change of manner which came over these birds as the moult began will be appreciated by reference to the tabulated schedule of visits. The pugnacious bravery of the female at her first nest is amply attested by the photographs, while the records of the second nest show that the birds rarely permitted themselves to be observed, even at a distance, although they had eggs as before.

These Horned Grebes were absolutely isolated so far as concerns other individuals of the species. There were certainly no other Grebes in the slough. Their nesting associates were as follows: Red-winged Blackbird , about three pairs nesting; Sora Rail , three or four pairs nesting; Wilson's Phalarope , several pairs; Killdeer , one pair in evidence; Savannah Sparrows were present at the slough all summer; and a pair of Pintails were believed to have a nest in an adjoining field. The adjoining prairie was monopolized, as usual, by the Horned Larks and Longspurs .

At the present writing this slough is dry; the road which passes through it is traveled every day by automobiles; and the spot where the Grebes established their home a year ago has now been plowed and planted.

FOOTNOTE:

Mr. A. A. Saunders advises me that so far as he is aware this is the only record of nesting of the Horned Grebe in Montana, although he has found two previous records of occurrence of the species in the state.

HISTORICAL NOTES ON HARRIS'S SPARROW .

BY HARRY HARRIS.

During the early decades of the nineteenth century when those pioneer ornithological enthusiasts, whose names and discoveries are familiar to all students of the science, were pushing beyond the frontiers in quest of new objects of study, the Kansas City region was the gateway to the wilderness and the very outpost of civilization. In this immediate neighborhood where the down-rushing Missouri is joined by the less turbulent Kaw, and where the great river bends finally to the east, were situated the frontier settlements of Independence, Fort Osage , Westport, and the great Konzas Indian village, while a short distance up-stream were three other landmarks frequently mentioned by travelers. Fort Leavenworth, the mouth of Little Platte River, and the Black Snake Hills.

These names bring to mind several notable ornithologists and botanists whose published journals and narratives are at once fruitful sources of information to the working student and delightful reading to any person. Of all the young scientists who passed this way in their eagerness to explore the unknown beyond and gather its treasures to science, perhaps none are of more interest, though others may be more widely known, than John K. Townsend and Thomas Nuttall. Nuttall's discovery here of the bird now known as Harris's Sparrow , together with the fact that two other eminent ornithological explorers, at later periods, each believed he had discovered the bird in this same region, renders the tradition of peculiar and obvious local interest.

A long entertained hope of being able to determine the actual locality in Jackson County, Missouri, where Nuttall took the original specimen of this Sparrow, has led the writer to bring together the widely scattered data bearing on the early history of the bird. The facts in question, which do not appear to have been previously assembled, present several interesting features.

The information contained in this short paragraph is the only guide the writer has had in a search for the spot where the species was first met with. Not a little difficulty has been experienced in tracing the road between Independence and Westport in use in the early thirties, since but meager graphic record of its course has been preserved. The accompanying sketch map is in the main authentic, authorities differing as to only a short stretch about three miles from old Westport. Many years association with the birds of this region leads the writer to the conclusion that these scientists would have had difficulty in crossing the Blue Valley at this season of the year without seeing or hearing troops of these striking Sparrows. That part of the road lying within the valley is indicated on the map by arrows.

Townsend's frame of mind on this momentous day is best described in his own words. "On the 28th of April, at 10 o'clock in the morning, our caravan, consisting of seventy men, and two hundred and fifty horses, began its march; Captain Wyeth and Milton Sublette took the lead, Mr. N. and myself rode beside them; then the men in double file, each leading, with a line, two horses heavily laden, and Captain Thing brought up the rear. The band of missionaries, with their horned cattle, rode along the flanks.

"I frequently sallied out from my station to look at and admire the appearance of the cavalcade, and as we rode out from the encampment, our horses prancing, and neighing, and pawing the ground, it was altogether so exciting that I could scarcely contain myself. Every man in the company seemed to feel a portion of the same kind of enthusiasm; uproarious bursts of merriment, and gay and lively songs, were constantly echoing along the line. We were certainly a most merry and happy company. What cared we for the future? We had reason to expect ere long difficulties and dangers, in various shapes, would assail us, but no anticipation of reverses could check the happy exuberance of our spirits.

"Our road lay over a vast rolling prairie, with occasional small spots of timber at the distance of several miles apart, and this will no doubt be the complexion of the track for some weeks.

"In the afternoon we crossed the Big Blue River at a shallow ford. Here we saw a number of the beautiful Yellow-headed Troopials, feeding upon the prairie in company with large flocks of Blackbirds, and like these, they often alight upon the backs of our horses."

Here is a vivid picture of a situation well calculated to stir the imagination and excite the enthusiasm of this twenty-five year old easterner on his first visit to the virgin West, and thoughts of ornithological discoveries were no doubt reserved for the future. Nuttall could not have been so distracted by the excitement incident to the departure of this wild cavalcade, since he had had several previous experiences of the wilderness, was an older man, and was by nature "shy, solitary, contemplative, and of abstract manner." At all events he set the ornithological pace immediately at the start of the journey by discovering a new bird. Townsend's silence in his 'Narrative' regarding this important event was of course due to courtesy to the discoverer who had not yet given his species to science.

In my account of Nuttall's discovery of his "Mourning Finch," I have assumed that the specimen he took in Jackson County is the type. Perhaps it would be more accurate to say that in the absence of any definite knowledge regarding the type specimen it is presumed from his description that the specimen here taken was the type. The description referred to was published in the second edition of his Manual which did not appear until 1840. It will thus be seen that this important species was allowed to remain in obscurity for six years while twenty-four other new species subsequently discovered on the trip had been described, as well as sixteen figured by Audubon in the Great Work, prior to the appearance of Townsend's Narrative in 1839. Nuttall's published description of the bird is merely the briefest possible outline of salient specific characters, no measurements whatever being given.

On his return to the East, two years in advance of Townsend, Nuttall had in his possession a quantity of the latter's material for delivery to the Philadelphia Academy of Sciences, which Institution had helped substantially in financing the travelers. It was this material that Audubon sought so eagerly to possess, that his great work then nearing completion might not lack the new species. Audubon had called on Nuttall, in Boston, in the hope of assistance from that quarter, and was promised duplicates of all the new species in his possession. It is said that five species were here secured, but the Mourning Finch was not included. Nuttall had reserved this discovery for his own book, and not only was posterity thereby deprived of an Havell engraving of the largest and handsomest of our Sparrows, but Audubon, being kept in the dark, was himself to later publish the bird as the discovery of his friend Edward Harris.

Nuttall himself had overlooked an opportunity of discovering the bird twenty-four years earlier, and had his attention at that time been directed to birds as well as plants, he would no doubt have become acquainted with the species. Referring to the Journal of his companion, John Bradbury, an English botanist, it is found that they passed through this region during the spring migration of 1810, and while Nuttall's absent-minded preoccupation in collecting plants was a standing joke among the voyageurs, Bradbury was somewhat more alive to ornithological possibilities, and has left many entertaining, and a few valuable notes on the better known birds. They had spent April 8th and 9th at Fort Osage, now Sibley, Jackson County, Missouri; and the writer knows of no more certain place to find Harris's Sparrows in early April than in the timber and thickets of this bottom land.

The Lewis and Clark party had passed through this region in June, 1804, and again early in September, 1806, and Thomas Say of the Long Expedition had been here in August, 1819. Maximilian was therefore the first ornithologist to enter the range of this species while the birds were in transit.

The last "discoverer" was Edward Harris, in whose honor Audubon gave the bird its vernacular name. The memorable voyage of Audubon and Harris, together with Bell, Sprague, and Squires, up the Missouri River in 1843 is too well known to require comment. A few quotations will serve in connection with the story of the Sparrow. On May 2 the party passed the point in Jackson County, Missouri, where Nuttall and Townsend had left the river nine years previously. Early the next morning they reached Fort Leavenworth. After leaving this post the boat was stranded on a sand-bar from 5 o'clock in the evening until 10 the next morning, giving the naturalists considerable time to do some collecting in the neighborhood. In his famous journal of the voyage, Audubon says under date of May 4: "Friend Harris shot two or three birds which we have not yet fully established.... Caught ... a new Finch." And on the next day he states: "On examination of the Finch killed by Harris yesterday, I find it to be a new species, and I have taken its measurements across this sheet of paper." In volume seven of the octavo edition of his 'Birds of America,' where the new species taken on the trip are described, the remarks under the Sparrow are as follows: "The discovery of this beautiful bird is due to my excellent and constant friend Edward Harris, who accompanied me on my late journey to the upper Missouri River, &c., and after whom I have named it, as a memento of the grateful feelings I will always entertain towards one ever kind and generous to me."

"The first specimen seen was procured May 4, 1843, a short distance below the Black Snake Hills. I afterwards had the pleasure of seeing another whilst the steamer Omega was fastened to the shore, and the crew engaged in cutting wood.

"As I was on the look-out for novelties, I soon espied one of these Finches, which, starting from the ground only a few feet from me, darted on, and passed through the low tangled brushwood too swiftly for me to shoot on the wing. I saw it alight at a great distance, on the top of a high tree, and my several attempts to approach it proved ineffectual; it flew from one to another treetop as I advanced, and at last rose in the air and disappeared. During our journey up stream my friend Harris, however, shot two others, one of which proved a female, and another specimen was procured by Mr. J. G. Bell, who was also one of my party. Upon our return voyage, my friend Harris had the good fortune to shoot a young one, supposed to be a female, near Fort Crogan, on the fifth of October, which I have figured along with a fine male. The female differing in nothing from the latter.

"All our exertions to discover the nest of this species were fruitless, and I concluded by thinking that it proceeds further northward to breed."

The work in which this supposed discovery was announced was published in 1844, four years after the second edition of Nuttall's 'Manual' appeared. Since this manual was the first American work on ornithology, excepting Wilson's, to go into a second edition, it was presumably widely known among ornithologists, and it is not easy to understand why Audubon and his coworkers were in ignorance of their lack of claim to Nuttall's Mourning Finch.

During the twenty-five or thirty years following Audubon's visit to the Missouri haunts of the Sparrow, practically nothing was learned of its life-history or distribution, and the few scattered specimens that were taken were all from the same general region. A specimen furnished by Lieut. Couch, taken at Fort Leavenworth on October 21, 1854, formed part of the material used by Prof. Baird in his epochal work in 1858, as did another taken at the same point on April 21, 1856, by Dr. Hayden, of Lieut. Warren's Pacific Coast Surveys party. Dr. Hayden took three other specimens further up the river in the same year. Dr. P. R. Hoy, who collected in the type region in 1854, took a specimen on May 7, and on May 13 met with a troop of fifteen or twenty. There are a few other records from the Missouri Valley and one from Texas prior to the numerous ornithological activities of the early seventies. Dr. J. A. Allen, collecting in the interest of the Museum of Comparative Zo?logy, had his headquarters at Fort Leavenworth during the first ten days of May, 1871, and found Harris's Sparrows exceedingly abundant in the bottom timber on the Missouri side of the river. He added a few field notes on behavior, appearance, etc, and took a series of specimens. Baird, Brewer, and Ridgway state that from the time of its discovery in 1834 up to 1872 but little information had been obtained in regard to the Sparrow's general habits, its geographical distribution, or its mode of breeding, single specimens only having been taken at considerable intervals in the valley of the Missouri and elsewhere. In 1874 Dr. Coues brought together all the available data in his interesting article on the bird in 'Birds of the Northwest,' but was able to add nothing in determining the bounds of its habitat, which he gave as "Region of the Missouri. East to Eastern Iowa."

In 1913 Professor Cooke noted the interesting peculiarity of the migration of the Harris's Sparrow in the interval that elapses after the first spring advance. He states that the birds become common along the Missouri River in northwestern Iowa soon after the middle of March and yet it is not until early May that they are noted a few miles further north in southeastern South Dakota and southwestern Minnesota. He adds that the dates suggest the probability that these March birds have wintered unnoticed in the thick bushes of the bottomlands not far distant, and have been attracted to the open country by the first warm days of spring. This theory is borne out by the facts as observed by the writer in the Kansas City region. The birds are present in this vicinity during even the most severe winters, but keep to the dense shelter of the Missouri bottoms. During mild and open winters a few scattered flocks may even spend the entire season until spring in the hedges and weed patches of the prairie country.

This Sparrow has always attracted attention in the field by its large size and conspicuously handsome appearance, as well as by its sprightly and vivacious manner and querulous notes, but it has seldom been the subject of special notice in the literature of American birds. Its bibliography is chiefly confined to diagnostic listing in formal works on ornithology, brief annotations in faunal lists, and occasional mention in published field notes.

During the thirty-four years that have elapsed since Prof. Cooke's article of 1884, the Sparrow, as a migrant, has become well known to ornithologists. Its narrow migration path, the center of which in the United States is approximately down the 96th meridian, has been worked out; the wide extent of territory covered by stragglers has been fully reported; the food habits of the bird while on migration have been thoroughly investigated and the results published; the nest has been seen once, and young just out of the nest have been collected, and the general region of the breeding ground itself is known to be where barren tundra meets the edge of the timber between Hudson Bay and Great Bear Lake. But the eggs yet remain to be discovered.

FOOTNOTES:

A Manual of the Ornithology of the United States and of Canada, by Thomas Nuttall. Second edition of the volume on Land Birds. Boston, 1840.

Notes from a letter of Edward Harris, Auk, 1895, p. 227, Geo. Spencer Morris.

Reis im Innern Nord-Amerika. 2 Vols. Coblentz, 1839-1841.

Having access only to a reprint of this rare work in which the ornithological matter is largely deleted, I am indebted to Mr. Otto Widmann for this extract which he translated from the original publication.

The Migration of North American Sparrows. Compiled by Prof. W. W. Cooke, chiefly from data in the Biological Survey. Bird Lore, 1913, p. 301.

NOTES ON THE STRUCTURE OF THE PALATE IN THE ICTERIDAE.

BY ALEXANDER WETMORE.

From the examination of museum skins it appears that the palatal ridge begins to develop in juvenile birds a short time before they leave the nest, at a stage when the body is well covered with feathers, and the incoming tail feathers have attained a length of 20 to 25 millimeters. In such birds the keel appears as a very slightly raised ridge that forms a distinct line on the palate. The bill at this time has reached about three-fourths of the length attained when the bird is adult, so that the beginning of this ridge appears to be located far forward, though it occupies the same position in relation to the external nasal opening that the fully developed keel does in the adult. In the dried skins the ridge is somewhat indistinct, but it is possible that it may be more readily apparent in living or recently killed specimens.

No one apparently has raised the question of the possible function of this keel, developed as described above, so that it seems proper to record here certain field observations made by the writer that indicate the use of this structure. As might be expected it serves in securing and preparing certain parts of the food. In December 1917, near Stuttgart in eastern Arkansas, during a time when the ground was covered by a light fall of snow, flocks of Bronzed Grackles were found feeding among small groves of a pin oak . The ground under these trees was nearly bare and the birds were working about searching for the small acorns that had fallen and were partly concealed under leaves and low plant growth beneath the oaks. The Grackles were tame and with a pair of binoculars it was an easy matter to watch them at close range. The acorns were picked up, held in the bill and pressed firmly against the keel on the palate, then released, turned slightly by means of mandibles and tongue, and then again gripped strongly. In this way the acorn was rotated until a line had been impressed entirely around the shell. With a little further manipulation the shell dropped off in two halves and the kernel was swallowed entire without further preparation, though frequently it was gulped down only after some effort. After watching one feeding flock for some time I clapped my hands sharply to startle them and then examined the ground where they had been at work. Scattered among the leaves were many acorn shells, most of which had been cut in two in a line transverse to the longitudinal axis. Some had fairly smooth, clean-cut margins, while others were roughened and jagged. In searching through the leaves I picked up one acorn still intact that had been dropped by one of the birds, perhaps when the flock was frightened up, in which a line had been impressed entirely around the center. In this the impressions of the palatal keel were distinctly visible.

When attention was once attracted to this manner of feeding other incidents were noted in which the palatal keel was brought in play. On one occasion on the streets of Washington a Purple Grackle was observed attempting to split open a kernel of corn dropped from some passing dray. The bird held this grain in the slight notch near the center of the bill and pressed it against the angular keel. The grain proved refractory, as it snapped out several times, dropping 8 or 10 inches away, to be seized and again compressed. Watching until it had been dropped I frightened the bird and secured the kernel of corn. On one side four grooves impressed in the hard outer surface were visible showing where, and with what force, the sharp keel had been applied.

Apparently the palatal ridge develops with the gradual growth of the bill, and becomes fully functional shortly after the immature bird is left by its parents to its own resources in securing food. It seems to be fully grown in all by the middle of September. In many adult specimens the ridge shows signs of heavy wear from the nearly constant use to which it is put. In some the cutting angle was well rounded in front from constant abrasion, while in others the anterior margin had become irregular and broken. In one specimen the thin lower margin of the compressed keel was entirely worn away, leaving a low rounded projection in which the two sides of the fold by which the keel had been formed were clearly visible, with a line of separation between them. It was interesting to note that the palatal ridge was usually well worn in old adults, taken in late fall or early spring, belonging to the northern races while little or no wear was apparent in similar specimens of the southern form from South Carolina and Florida. The data available from the examination of a small number of stomachs of this form from Florida show a preponderance of insects and fruits with very little mast or grain, a fact of interest, but one that is not fully substantiated as the material available is small.

One species in which three subspecies have been described is at present known to belong in this genus. These will stand as follows:

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