BLUE-HEADED VIREO.

_Muscicapa solitaria_, WILS. Am. Orn. II, 1810, 143, pl. xvii, fig.

6. _Vireo solitarius_, VIEILL.—AUD. I.—CASSIN, Sc.—SCLATER, P. Z.

S. 1856, 298 (Cordova); 1859, 363 (Xalapa); 375 (Oaxaca?).—SCLATER

& SALVIN, Ibis, 1860, 31 (Guatemala).—CAB. Jour. III, 468

(Cuba).—GUNDLACH, Cab. Jour. 1861, 324 (Cuba; very rare).—SAMUELS,

Birds N. Eng. 277. _Vireo_ (_Lanivireo_) _sol._ BAIRD, Birds N.

Am. 1858, 329. _Vireosylvia_ (_Lanivireo_) _solitaria_, BAIRD,

Rev. Am. B. 1864, 347.

[Line drawing: _Lanivireo solitarius._

29274]

SP. CHAR. (No. 300 ♂.) Above olive-green, including upper

tail-coverts; the top and sides of head and nape ashy-plumbeous; sides

of the neck plumbeous-olive. Broad line from nostrils to and around

eye, involving the whole lower eyelid, white. A loral line involving

the edge of the eyelid, and a space beneath the eye, dusky plumbeous.

Beneath white; the sides yellow, overlaid with olive, this color not

extending anterior to the breast. Axillars and base of crissum pale

sulphur-yellow, the long feathers of the latter much paler or nearly

white. Wings with two bands and outer edges of innermost secondaries

olivaceous-white; the quills dark brown, edged externally with

olive-green, internally with white; tail-feathers similarly marked,

except that the lateral feather is edged externally also with white,

the central without internal border. Bill and legs blackish-plumbeous.

Iris brown.

First quill spurious, rather more than one fifth the second, which is

intermediate between the fifth and sixth; third longest.

Fresh specimen: Total length, 5.40; expanse of wing, 9.00. Prepared

specimen: Total length, 5.25; wing, 2.95: tail, 2.35.

HAB. United States, from Atlantic to Pacific; Cape St. Lucas. Not

recorded from Southern Rocky Mountains, where replaced by _L.

plumbeus_. South to Mexico and Guatemala. Vera Cruz (winter,

SUMICHRAST). Very rare in Cuba.

Spring specimens show sometimes a gloss of plumbeous on the back,

obscuring the olive, the contrast of colors being greater in the

autumnal and young birds. Sometimes the crissum appears nearly white.

The length of the spurious primary varies considerably, from .45 to

.75 of an inch.

In autumn the colors are similar, but slightly duller and less sharply

defined, while the back is considerably tinged with ashy.

HABITS. The Solitary Vireo appears to be found, irregularly,

throughout the United States. Nowhere abundant, so far as I am aware,

it seems to be more common in California than on the Atlantic, while

there are also large tracks of intervening territory in which we have

no knowledge of its presence. On the Atlantic it has been met with

from Georgia to the Bay of Fundy. In Massachusetts it has been found

in a few restricted localities; in one or two of them, they are as

abundant as the White-eyed. Mr. Dresser found it in Texas, near San

Antonio, late in the autumn, and early in spring, but none remained to

breed. Mr. Boardman gives them as a summer visitant at Calais, but not

common, and Professor Verrill makes a similar statement for Western

Maine, where it arrives in the second week of May. According to Mr.

Allen, it reaches Western Massachusetts by May 1, but it is there

quite rare. A few are presumed to stop and breed.

In California, Mr. Gambel states that it is quite abundant in the

latter part of summer, and throughout the winter, frequenting low

bushes and thickets. Dr. Heermann also frequently met with it. Both at

the East and the West it is undoubtedly only migratory to about the

40th parallel, and does not, except in mountainous localities, breed

south of that line. Professor Baird found it breeding in the South

Mountains, near Carlisle, Penn., in May, 1844. It occurs in Guatemala

in the winter.

Dr. Cooper states that it reaches Puget Sound by the first of May, and

he has also observed it in the Colorado Valley, after the 14th, where

they made themselves conspicuous by their song, but in a few days had

all passed northward. He has met them nesting in May at the eastern

base of the Coast Range, and has also found them quite common, in

summer, on the Columbia River. Their favorite resorts are the

deciduous oaks.

These birds were found breeding at Fort Tejon by Mr. Xantus, and at

Vancouver by Mr. Hepburn.

Mr. Ridgway met with a few in September, in the thickets along the

streams flowing from the Clover Mountains.

This species was taken in winter by Mr. Boucard, at Talew, in the

State of Oaxaca, Mexico.

Mr. Audubon’s statement that this bird is rather abundant, and that it

breeds in Louisiana, is undoubtedly incorrect, and his description of

its nest and eggs belongs rather to the Yellow-throated, and agrees

with none that I have ever seen of this species. That he found them

abundant in Maine, and traced them as far north as Pictou, Nova

Scotia, is more probable. Dr. Bachman speaks of this species becoming

each year more abundant in South Carolina, coming in February and

remaining through March.

Mr. Nuttall, who met with this species on the Columbia, about the

beginning of May, describes its song as a plaintive, deliberate

warble, intermediate between the song of the _olivaceus_ and the

_flavifrons_. Mr. Burroughs describes the love-notes of these birds as

being inexpressibly sweet and tender in both sexes. The song of the

male, as I have heard it, bears no resemblance to that of any other

Vireo. It is a prolonged and very peculiar ditty, repeated at frequent

intervals and always identical. It begins with a lively and pleasant

warble, of a gradually ascending scale, which at a certain pitch

suddenly breaks down into a falsetto note. The song then rises again

in a single high note, and ceases. For several summers the same bird

has been heard, near my house in Hingham, in a wild pasture, on the

edge of a wood, always singing the same singular refrain, during the

month of June.

Mr. Nuttall found a nest of this species suspended from the forked

twig of a wild crab-tree, about ten feet from the ground. The chief

materials were dead and withered grasses, with some cobwebs

agglutinated together, externally partially covered with a few shreds

of hypnum, assimilating it to the branch on which it hung,

intermingled with a few white paper-like capsules of the spiders’

nests, and lined with a few blades of grass and slender root-fibres.

Seven nests of this species, found in Lynn and Hingham, Mass., exhibit

peculiarities of structure substantially identical. In comparison with

the nests of other Vireos, they are all loosely constructed, and seem

to be not so securely fastened to the twigs, from which they are

suspended. One of these nests, typical of the general character,

obtained in Lynn, May 27, 1859, by Mr. George O. Welch, was suspended

from the branches of a young oak, about twelve feet from the ground.

The external depth of this nest was only two and a half inches, the

diameter three and a quarter, and its cavity one and three quarters

inches deep, and two inches wide at the rim. It was constructed

externally of strips of yellow and of gray birch-bark, intermingled

with bits of wool and dry grasses. The external portion was quite

loosely put together, but was lined, in a more compact manner, with

dry leaves of the white pine, arranged in layers. Another nest, found

in Hingham, was but two feet from the ground, on a branch of a hickory

sapling. In its general structure it was the same, only differing in

shape, being made to conform to its position, and being twice as long

as it was broad. It contained four young, when found, about the 10th

of June. One nest alone, built on a bush in Lynn, exhibits even an

average degree of compactness in its external structure. This is

largely composed of cocoons, which are woven together into a somewhat

homogeneous and cloth-like substance. Within, decayed stems of grasses

take the place of the usual pine-needles.

In the summer of 1870 a pair built their nest in a dwarf pear-tree,

within a few rods of my house. They were at first very shy and would

not permit themselves to be seen at their work, and suspended all

labor when any one was occupied near their chosen tree. Soon after the

construction of the nest two Cowbird’s eggs were deposited, which I

removed, although the female only laid two of her own before she began

to sit upon them. By this time she became more familiar, and would not

leave her nest unless I attempted to lay hands upon her. She made no

complaints in the manner of the White-eyed, nor sought to attack like

the Yellow-throated, but kept within a few feet, and watched me with

eager eyes, until I left her. Unfortunately, her nest was pillaged by

a Black-billed Cuckoo, and I was unable to observe her feed her young,

as I had hoped to do.

The eggs are of an oblong-oval shape, moderately pointed at one end,

and of a white ground, less crystalline than in the other species of

its kind. They are spotted pretty uniformly over the entire egg with

dots of dark red and reddish-brown. They are usually five in number.

Lanivireo solitarius, var. cassini, BAIRD.

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