Western wood-pewee (Contopus sordidulus)

Arenal western wood-pewee tentative ID by MerlinBirdID. 2018-03-01 07.50.38 Costa Rica
Classification: Genus Contopus; Family Tyrannidae
General: The western wood pewee (Contopus sordidulus) is a small tyrant flycatcher. Adults are gray-olive on the upperparts^[2] with light underparts, washed with olive on the breast. They have two wing bars and a dark bill with yellow at the base of the lower mandible. This bird is very similar in appearance to the eastern wood pewee; the two birds were formerly considered to be one species. The call of C. sordidulus is a loud buzzy peeer; the song consists of three rapid descending tsees ending with a descending peeer. [more]

First documented observation : 2018-03-01 in Costa Rica.