CHESTNUT-SIDED WARBLER. 213 
and may be heard for some distance, may be imitated by the syllables rheet, rheet, 
rheet, rheet, ridi, idi, e-e-e-e-e-e-e; beginning with several soft, warbling notes, and 
ending in a rather prolonged but quite musical squeak. The latter and more rapid 
_ part of the strain, which is given in the upward slide, approaches an inseét-quality of 
tone which is more or less peculiar to all true Warblers. This song is so common here 
as to be a universal characteristic of our tall forests. The bird is shy when started 
from the nest, and has the sharp chipping alarm-note common to the family. The 
nest is saddled on a horizontal limb of considerable size, some distance from the tree, 
and some forty or fifty feet from the ground. Small, and very neatly and com- 
‘pactly built.” 
According to Prof. J. A. Allen, a nest, found at East Penfield, Monroe Co., N. Y., 
June 7, 1878, was placed in the fork of a small ash tree, about twenty-five feet from 
the ground. It was neatly and compactly built, consisting externally of fine dry 
grasses of an ashen tint, bound firmly together with spider’s silk, to which were affixed 
a few bits of whitish lichen; it was lined with strips of bark and fine grasses, of a 
reddish-brown color. The nest was thus gray externally and brown within. Another 
nest, found at Mount Carmel, Ill, May 16, 1878, differed from the one described in 
having thicker walls, thus giving to the structure greater bulk and firmness. It was 
partly covered externally with lichens, and was also placed about twenty-five feet from 
the ground. 
The eggs are bluish or greenish-white, spotted with reddish-brown or lilac, chiefly 
on the larger end. 
NAMES: CERULEAN WARBLER, Azure Warbler, Blue Warbler. 
SCIENTIFIC NAMES: Sylvia cerulea Wilson (1810). DENDROICA CAZRULEA Bairp (1858). 
ca 
DESCRIPTION: Small, and very beautiful. Male, above, azure-blue, with black streaks; beneath, pure 
white, with dusky-blue streaks on the breast and sides; wings, with two white bars; bill, black. 
Female, with the blue impure tinged with greenish; beneath, white, tinged with greenish-yellow. 
Length, 4.25 inches; wing, 2.65; tail, 1.90 inches. 
CHESTNUT-SIDED WARBLER. 
Dendroica pensylvanica PARKER. 
Piaté XII. Fic. 5. 
BN WISCONSIN this elegant species is not uncommon. Its favorite haunts are 
4 the bushes on the woodland border and the swampy thickets in pastures and 
meadows, where Catbirds, Thrashers, Towhee Buntings, White-eyed Vireos, Ovenbirds, 
Maryland Yellow-throats, the Veery and the Rose-breasted Grosbeak are its near 
neighbors. Despite the swarms of mosquitoes, these low and bushy localities are very 
interesting to the friend of nature. Beautiful shrubs and flowers grow on all sides with 
