Horned Screamer
Anhima cornuta
The horned screamer is a massive 84–95 cm (33–37.5 in) long, 3.5 kg (7.7 lb) bird, with a small chicken-like bill. The upperparts, head, and breast are black, with white speckles on the crown, throat and wing coverts. There is a long spiny structure projecting forward from the crown. This structure is unique among birds and is not derived from a feather but is a cornified structure that is loosely attached to the skull and grows continuously while often breaking at its tip. This gives this species its name. It has very long and lanky legs and three large toes in each. Voice: The horned screamer's call, as the name suggests, is a very loud and repetitive echoing sound. It is called "el clon-clon" in Ecuador because of this peculiar feature.
ID text from Wikipedia, CC BY-SA 4.0
Northern Screamer
Chauna chavaria
The northern screamer is 76 to 91 cm (30 to 36 in) long. They are stout bodied with a disproportionately small head and a gray bill. The sexes have the same plumage. Adults have a gray crown with a long crest, a mostly white face, a wide black band around the neck, and a dark gray body, wings, and tail. Their wing has two sharp spurs at its manus. They have bare red skin around their brown eye and reddish orange legs and feet. Juveniles are similar to adults but drabber. Voice: The northern screamer, like others of its family, is very vocal. Its primary vocalization is a "single, rather high-pitched yelping call...'kleer-a-ruk, cherio'."
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Horned Screamer and Northern Screamer.