Though this species arrives in Jamaica rather later than the preceding, they depart together, about the 20th of April: and soon after this their appearance in the United States is recorded. Unlike the preceding, the present species is said to be, even in summer, destitute of song.
BLUE YELLOW-BACK WARBLER.[35]
Parula Americana.
| Parus Americanus, | Linn. |
| Sylvia Americana, | Lath.—Aud. pl. 15. |
| Sylvia pusilla, | Wils. |
| Parula Americana, | Bonap. |
[35] Length 4½ inches, expanse 7, flexure 2¼, tail 1⁶⁄₁₀, rictus ⁵⁄₁₀, tarsus ¾, middle toe ⁴⁄₁₀.
This pretty little species, so much in habits and appearance like the European Tits, arrives in Jamaica early in September, and retires late in April, for we last saw it on the 20th. During the autumn and winter it was among the most common of our warblers. In the morasses, especially, they were to be seen in numbers, yet not in company, making the sombre mangrove-woods lively, if not vocal. They are active and restless, hopping perpendicularly up the slender boles, and about the twigs, peeping into the bases of the leaves, and crevices of the bark, for insects.
The female, identified by dissection, has all the colours paler, but agrees with the male in their variety and distribution. Individuals, however, were found in September, which had the blue plumage of the head and of the rump, tipped with yellow, imparting a green tinge to those parts.