First description of the nest and eggs of the island-endemic Cozumel Vireo, Vireo bairdi

We report the first description of the nest, eggs, and nesting phenology of the Cozumel Vireo (Vireo bairdi), a passerine species endemic to Isla Cozumel, Mexico. We discovered three nests of this species in 2009. These open-cup nests were woven onto branches and hung beneath forks. Clutch size was 2-3 eggs, and eggs were ovate and had a white ground color with reddish-brown flecks. These characteristics of nests and eggs are similar to those of most other Vireo spp., including other West Indian members of the Vireo subgenus. Breeding activities, including egg-laying, incubation, and nestling and post-fledging provisioning occurred from May to July 2009. We estimated the length of incubation to be ~14 days and length of the nestling stage to be 11-12 days. Much of the Cozumel Vireo's breeding biology remains unknown and further study of this single-island endemic is needed.
The vireos (Vireonidae) comprise 52 species that range from North to South America, including many islands (Brewer and Orenstein 2010). Vireo, largest of the family' s four genera, contains 31 [...]