A 'breast plate': the iridescent 'crescent'-shaped throat and breast feather groups of the male Riflebirds (=bib) [1]; The highly iridescent throat feathers on certain species of hummingbirds [2].
References[]
^Simpson & Day (1999). A Field Guide to the Birds of Australia, 6th Edition. Penguin. ISBN0-691-04995-5.
^Garrigues, Richard and Dean, Robert (2007). The Birds of Costa Rica. Zona Tropical Publication. ISBN9780801473739. CS1 maint: Multiple names: authors list (link)
This article is part of Project Glossary, an All Birds project that aims to write comprehensive articles on each term related to animals.