Red-rumped Cacique
Cacicus haemorrhous
Male red-rumped caciques average 29 cm (11 in) long and 96.5 g (3.4 oz). Females average 25 cm (9.8 in) long and weigh 62 to 74 g (2.2 to 2.6 oz). The sexes have essentially the same plumage though females are overall duller than males. Adults of the nominate subspecies C. h. haemorrhous are mostly glossy black with a bright red lower back and rump. Males have a pale blue iris and females a brownish blue iris. Both sexes have an ivory-colored bill and black legs and feet. Juveniles resemble adult females. Subspecies C. h. Voice: The red-rumped cacique has a "oud, complex and varied repertoire of songs and calls, particularly among males". They have been described as an "unstructured series of high, hoarse sreek sreek... notes (not unlike barking of small dog)." When alarmed all the members of a colony give "a loud harsh kak-kak-kak.
ID text from Wikipedia, CC BY-SA 4.0
Scarlet-rumped Cacique
Cacicus uropygialis
The scarlet-rumped cacique is sexually dimorphic like many Icteridae, though it mainly concerns size in this species. Males are 23 cm (9 in) long and weigh 68 g (2.4 oz), while the female is 20 cm (8 in) long and weighs 53 g (1.9 oz); This cacique is a slim long-winged bird, with a relatively short tail, blue eyes, and a pale yellow pointed bill. It has mainly black plumage, apart from a scarlet patch on the lower back and upper rump. The female is smaller and a duller black than the male, and the juvenile bird has a brownish tone to the plumage and a brownish-orange rump.
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: Red-rumped Cacique and Scarlet-rumped Cacique.