Brown-crested Flycatcher (Myiarchus tyrannulus)

The Brown-crested Flycatcher is a resident species, member of the Myiarchus family, which is notably difficult to identify at a species level. The Brown-crested is found only in the northern Pacific area, up to about the Tarcoles river. It shares distribution with the Nutting’s Flycatcher, and are difficult to differentiate given its essentially equal coloration except for the rump; their song is an important trait to identify them. The Brown-crested is found in mangrove forest edge, whereas the Nutting’s is not. It was interesting to see this individual raising its crest, most probably a display to let us know we were in his/her territory.

Mangrove Swallow (Tachycineta albilinea)

Mangrove swallows are interesting in that they are not only found inside the mangrove forest, but in the whole river ecosystem. We did see a few of these birds inside the mangrove. They were flying by the boat very rapidly like most other swallows, which made in-flight pictures very difficult. Still pictures were better, as the birds perched in huge numbers on dead trees. They are distinguished from other swallows by their white underparts (up to the throat) and metallic green upperparts, only similar to the Blue-and-white Swallow, however the latter species is found throughout the country and not just on the coast; also it has blue upperparts instead of green.