Cherrie's tanager (Ramphocelus costaricensis) is named to commemorate American naturalist, explorer and adventurer George Cherrie. Dr. Cherrie accompanied former President Theodore Roosevelt in the famous 1913 exploration of the River of Doubt, in the Brazilian amazon basin later named Rio Roosevelt. It is a gregarious bird found on the Pacific coast of Costa Rica and Panama. The adult male is mainly black except for a scarlet rump, silvery bill and dark red iris. The female has a grey head, olive upperparts, orange rump, brownish wings and tail.