Kirwan GM, Collar NJ.

The ‘foremost ornithological mystery of Costa Rica’: Amazilia alfaroana Underwood, 1896

. Zootaxa [Internet]. 2016 Nov. 10 [cited 2025 Apr. 5];4189(2):244–250. Available from: https://mapress.com/zt/article/view/zootaxa.4189.2.2