Alder Flycatcher
Empidonax alnorum
E. alnorum is one of the larger Empidonax species, attaining a length of 13–17 cm (5.1–6.7 in), and a weight of 12–14 g (0.42–0.49 oz). The wingspan ranges from 21–24 cm (8.3–9.4 in). The upperparts of E. alnorum are dull greenish-olive. The crown is a slightly darker olive-green than the back. The throat is white, with a darker breast band. Thin white rings surround the eyes. The bill is wide and moderate in length, with pinkish or yellow-orange lower mandible and black upper mandible. Wings are generally black, with white wing bars and white edges of the innermost secondaries (tertials). Voice: The vocalizations of the alder flycatcher are very useful for its identification in the field. The song is a distinct "fee-bee-o"; birds have been observed to throw their heads back and shake their tails while singing. There are a variety of calls made, the most common of which is a "pit" sound produced when foraging.
ID text from Wikipedia, CC BY-SA 4.0
Boat-billed Flycatcher
Megarynchus pitangua
The boat-billed flycatcher is 21.5 to 24 cm (8.5 to 9.4 in) long and weighs 53 to 70 g (1.9 to 2.5 oz). The sexes have the same plumage. Adults of the nominate subspecies M. p. pitangua have a blackish brown or sooty crown with a mostly hidden yellow to orange-rufous patch in the center. They have a wide white supercilium that begins at the forehead and wraps almost all the way around the nape, a wide black band from the lores to the ear coverts, and white cheeks. They have olive to dull brownish olive upperparts. Voice: The boat-billed flycatcher's dawn song has been described as a "loud but simple and clear, slightly reedy and rolled whée-dic, pprrri-iu, chirr-rr or cheer chirree, monotonously repeated". It also sings a "shorter prriu or cheer punctuated by slurred bo-oy or chrr-ee". The nominate subspecies makes a "strident nasal kryeeeh-nyeh-nyeh-nyeh" call; subspecies M. p.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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