Casqued Cacique
Cacicus oseryi
Male casqued caciques average 37 cm (15 in) long and 188 g (6.6 oz). Females average 29 cm (11 in) long and 101 g (3.6 oz). Males have a prominent casque and females a smaller one. The casque's color is usually yellowish gray to olivaceous gray, sometimes ivory-colored with a greenish tinge and a dark gray tip, and sometimes entirely dark gray. The sexes have the same plumage. Adults are mostly rich chestnut. Their tail is mostly dusky olive with bright yellow outer feathers. Their wing's flight feathers have yellow edges. Voice: The casqued cacique's song is "a descending loud, electric, buzzing tok'DJZZEEEEEEEROP. Its "loud, squawking calls" include a "zhrak! and a repeated zhreeo! zhreeo! zhreeo", and displaying males "give a long squa-a-a-a-a-ooók! and a ringing ko-kooó-glee!".
ID text from Wikipedia, CC BY-SA 4.0
Mountain Cacique
Cacicus chrysonotus
Mountain caciques are about 25 to 30 cm (9.8 to 12 in) long. Males weigh about 92 to 98 g (3.2 to 3.5 oz) and females about 64 to 67 g (2.3 to 2.4 oz). The sexes have essentially the same plumage though females are a duller black than males. Adults are almost entirely glossy black. Their lower back and rump are yellow, and some individuals have some to much yellow on the upperwing coverts. They have a blue to bluish white iris, a pale yellow-ivory to greenish ivory bill with a bluish gray base, and black legs and feet. Juveniles have dark brown eyes but are otherwise like adults. Voice: The song of the male mountain cacique is described as "pig-like squeals followed by high-pitched notes and accelerating into a rattle". It is "quite vocal, with a variety of loud calls including a wree-wree-wree-wreeuh, sometimes just a single wree! or kreeuh!, and a repeated more nasal skeeuh".
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: Casqued Cacique and Mountain Cacique.