It is a mid-sized songbird and generally typical oriole. It is bright orange overall with a black bib and black spotting on the sides of the breast. The sexes are similar looking generally but females and juveniles are olive-green on the back and tail, dusky wings, and little or no black on face, throat, or breast. Adults measure 21–24 cm (8.3–9.4 in) in length. Males weigh around 50 g (1.8 oz) on average, while females weigh 45 g (1.6 oz). The wing bone measures 8.8–11.4 cm (3.5–4.5 in), the tail measures 8.5–11.2 cm (3.3–4.4 in), the culmen measures 1.9–2.4 cm (0.75–0.94 in) and the tarsus measures 2.6–3 cm (1.0–1.2 in).
The spot-breasted oriole ranges only on the Pacific side of Central America. An introduced breeding population also exists on the Atlantic coast of southern Florida. The population is considered to be established enough to be "countable" for birdwatchers by the ABA.
- BirdLife International (2012). "Icterus pectoralis". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- CRC Handbook of Avian Body Masses by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0849342585.
- New World Blackbirds: The Icterids by Alvaro Jaramillo & Peter Burke. Christopher Helm Publishing (1999), ISBN 978-0713643336
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