Olive Sunbird

Small dark nightjar of humid lowland forest in the Yucatan Peninsula, heard far more often than seen. Favors dense tangled forest, less often edges, and usually sings from a concealed perch. Sexes look similar, cryptic brown to rusty overall with a rather plain, dark face and throat, white ‘vicar’s collar,’ and narrow white tail tip. Loud, resonant whistled whierrr song is repeated steadily.

Tiny, with long wings and a short greenish bill with a small red base. Face and underparts are plain slaty gray on male, and buffy to whitish on female and juvenile. Adults have plain flanks and boldly barred undertail coverts. Juvenile has barred flanks; compare to similar Baillon’s Crake. Breeds in freshwater wetlands with extensive emergent vegetation, and spends the non-breeding season in a wide range of marshy habitats. Often favors deeper-water aquatic plant stands than other rails and crakes, clambering about nimbly amongst the vegetation. Usually retiring and rarely seen, but can be confiding. Males give a long song that starts with a series of “qwek” notes that eventually accelerates and tapers off; females respond with a descending trill with a similar quality.

Small hummingbird endemic to the Marías archipelago, located about 60 miles off the Pacific coast of central Mexico. Male is glittering green with and iridescent throat and bright red bill. Female is gray underneath with a dark mask bordered with white, and red at the base of her bill. The only other hummingbird on the islands is the very different Cinnamon Hummingbird. Inhabits scrub, woodland, and gardens on all four of the islands.