Recommended citation
BirdLife International (2023) Species factsheet: Tyrannus crassirostris. Downloaded from
http://datazone.birdlife.org/species/factsheet/thick-billed-kingbird-tyrannus-crassirostris on 31/05/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 31/05/2023.