Yellow-billed Cuckoos are fairly large, long, and slim birds. The bill is almost as long as the head, thick and slightly downcurved. They have a flat head, thin body, and very long tail. Wings appear pointed and swept back in flight.
Longer, but slighter, than American Kestrel; about the size of a Blue Jay or Western Scrub-Jay.between robin and crow
- Both Sexes
- Length: 10.2-11.8 in (26-30 cm)
- Weight: 1.9-2.3 oz (55-65 g)
- Wingspan: 15.0-16.9 in (38-43 cm)