Yellow-rumped Cacique vs Red-rumped Cacique

The Yellow-rumped Cacique has a bright yellow rump, while the Red-rumped Cacique features a bright red rump. Both species are primarily black with blue eyes, but their rump colors are the most reliable distinguishing feature. The Yellow-rumped Cacique is often seen in colonies, whereas the Red-rumped Cacique may be more solitary.

Look for the rump color: yellow for Yellow-rumped Cacique and red for Red-rumped Cacique. Observe social behavior; large colonies suggest Yellow-rumped Cacique. Note that the Red-rumped Cacique's red rump may be hidden when perched.

Yellow-rumped Cacique males are larger than females, but both are generally similar in size to the Red-rumped Cacique.

The Yellow-rumped Cacique has yellow patches on the wings, rump, and vent, while the Red-rumped Cacique displays a bright red lower back and rump, which can be hidden under folded wings. Both have blue eyes and a pale bill.

Yellow-rumped Caciques are highly social and breed in large colonies, whereas Red-rumped Caciques may be seen alone or in smaller groups.

Both species are found in forested areas, but the Yellow-rumped Cacique is more frequently seen along forest and river borders.

The Yellow-rumped Cacique has a complex communication system with colony-specific song repertoires, while specific vocalization details for the Red-rumped Cacique are less documented.