Neotropical 2023

Neotropical Flyways Project

Coccyzus americanus

Yellow-billed Cuckoo

Cuckoos / Cucos
This remarkable migrant winters deep in South America, with “true” over-wintering records hailing from south of the Amazon basin in Brazil, Paraguay and Bolivia. Where and when the species stops between North and South America was largely unknown until recently. In 2016, occupancy surveys carried out under the Neotropical Flyways Project discovered large numbers of birds in Colombia’s Caribbean dry forests. Worryingly, these same forests have been ravaged by humans and today just 8% of the original forest cover remains. Subsequent deployments of radiotransmitters revealed birds stopping over in the region for anywhere between one to 15 days, while they feast on an abundance of caterpillars associated with spring rains and the leaf-up. Further study has described foraging preferences for certain tree species, where caterpillars are most abundant, suggesting a mechanism for increasing habitat for this declining species through the promotion of silvopastures (see the report by Bayly 2018 in Publications).

MAP

1

Season: Spring

Description

Likely spring stopover regions for Yellow-billed Cuckoo in northern Colombia overlap with the distribution of tropical dry forests in the Caribbean lowlands