This beautiful Warbler is yellow below and on the rump, streaked on the breast and sides with black; the ear coverts and sometimes the throat are chestnut. They are very local in their distribution both during migrations and in their breeding grounds. They nest in the outer branches of trees, preferably conifers, making the nest of slender twigs, rootlets, grasses, etc., lined with hair; the four or five eggs are white, variously specked with reddish brown and lilac; size .65 × .48. 651. OLIVE WARBLER. _Peucedramus olivaceus._ Range.--Mountains of New Mexico and Arizona southward. This peculiar species may readily be recognized by its saffron or orange-brown colored head and neck, with broad black bar through the eye. They nest at high elevations in coniferous trees on the mountain sides, placing their nests either on the horizontal boughs or forks at the end of them. The nests are very beautiful structures made of moss, lichens, fine rootlets and grasses and setting high on the limb like those of the Blue-gray Gnatcatcher. The eggs are grayish white with a bluish tinge, thickly speckled with blackish; size .64 × .48. Data.--Huachuca Mts., Arizona, June 21, 1901. Nest in a sugar pine near extremity of branch, 25 feet from the ground and 20 feet out from the trunk of the tree; composed of lichens and fine rootlets, lined with plant down. [Illustration 393: White.] [Illustration: Parula Warbler. Sennett's Warbler.] [Illustration: Grayish blue.] [Illustration: deco.] [Illustration: right hand margin.] Page 392 652. YELLOW WARBLER. _Dendroica æstiva æstiva._ Range.--Breeds in the whole or North America; winters south of our borders. This well known and very common species is wholly yellow, being more or less greenish on the back, wings and tail, and the male is streaked on the sides with chestnut. They nest anywhere in trees or bushes, either in woods, pastures, parks or dooryards, and their sprightly song is much in evidence throughout the summer. The nests are usually placed in upright crotches or forks, and are made of vegetable fibres and fine grasses compactly woven together and lined with plant down and hair; the eggs, which are laid in May or June, are greenish white, boldly specked in endless patterns with shades of brown and lilac; size .65 × .50. 652a. SONORA YELLOW WARBLER. _Dendroica æstiva sonorana._ Range.--Arizona, New Mexico and western Texas, southward. This form is brighter yellow, especially above, than the last. The nesting habits are the same and the eggs indistinguishable from those of the preceding. 652b. ALASKA YELLOW WARBLER. _Dendroica æstiva rubiginosa._ Range.--Breeds in Alaska and on the coast south to Vancouver; winters south of the United States. Similar to the common Yellow Warbler but slightly darker above; its eggs and nesting habits are the same. [Illustration 394: Greenish white.] [Illustration: Cape May Warblers. Yellow Warblers.] [Illustration: deco.] [Illustration: left hand margin.]