About Contopus sordidulus P.L.Sclater, 1859
Adult Contopus sordidulus have gray-olive upperparts and light underparts, with the breast suffused with olive. They have two wing bars, and a dark bill with yellowing at the base of the lower mandible. This species looks very similar to the eastern wood pewee, and the two were previously classified as a single species. The call of Contopus sordidulus is a loud, buzzy peeer. Its song is made of three rapid descending tsees that finish with a descending peeer. This species measures 14–16 cm (5.5–6.3 inches) in length, weighs 11–14 g (0.4–0.5 oz), and has an average wingspan of 26 cm (10.2 inches). Its breeding habitat is open wooded regions across western North America. These birds migrate to South America at the end of summer. The female lays two or three eggs in an open cup nest, built on a horizontal tree branch or inside a tree cavity; California black oak forests are an example of suitable nesting habitat for this species. Both adult parents feed the hatchlings.
