n.Old World ground-living cuckoo having a long dagger-like hind claw

Coucal
Coucal
Coucal
NOTES ON THE BIOLOGY OF THE BLACK COUCAL
Black Coucal Centropus grillii Egg Volume Predicts Their Polyandrous Mating System
HAND-REARING A WHITE-BROWED COUCAL Centropus superciliosus AT EXMOOR ZOO
Aspects of the Breeding Biology of the Pheasant Coucal Centropus phasianinus
Paternity in the classical polyandrous black coucal (Centropus grillii)—a cuckoo accepting cuckoldry?
Breaking the rules: sex roles and genetic mating system of the pheasant coucal.
Solo and duet calling in the pheasant coucal: sex and individual call differences in a nesting cuckoo with reversed size dimorphism