Knock-knock, who's there?

Thanks to Alan once again, for sharing more of Chan Chich's birds. These are Pale-billed Woodpeckers (Campephilus guatemalensis), possibly a pair although the female normally has more black on her head than is shown here. North American visitors often comment that this resembles a Pileated Woodpecker, which indeed it does, although it is somewhat smaller. This species is readily seen around Chan Chich Lodge -- it likes good quality forest -- and is well known for the distinctive knock-knock on wood, making it fairly easy to spot.