About Setophaga adelaidae (S.F.Baird, 1865)
Adelaide's warbler (Setophaga adelaidae) has gray upperparts and yellow underparts. It has a yellow line above the eye and a white half-moon marking below the eye. On average, this species reaches 12 cm (4.7 in) in length and weighs 7 g (0.25 oz).
Adelaide's warbler is found only on the main island of Puerto Rico and the island municipality of Vieques. It occurs mainly in dry forests in southern Puerto Rico, such as Guánica State Forest. Smaller populations are also found in northern moist forests and Puerto Rico's central mountain range, the Cordillera Central.
Adelaide's warbler is an insectivore that gleans insects from the mid to upper sections of the forest. Very rarely, it also eats spiders and small amphibians like coquís. It typically travels in mixed-species flocks that commonly include Puerto Rican todies, vireos, and other New World warblers.
For reproduction, Adelaide's warblers build nests at heights between 1 and 7 meters. The female lays between 2 and 4 white eggs, which usually have small brown spots on their shells.
