Justification of Red List Category
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
Partners in Flight estimate the global population to number 5.6 million mature individuals (A. Panjabi in litt. 2017).
This species has been increasing over the last 50 years in North America (74% increase between 1966 and 2015 based on the North American Breeding Bird Survey [Sauer et al. 2017], or 40% increase between 1970 and 2014 based on Partners in Flight [A. Panjabi in litt. 2017]). Recent trends suggest a large, significant increase of 26.2% over the last three generations (Sauer et al. 2017).
Say's Phoebe occurs from Canada, through the USA, into Mexico.
Text account compilers
Ekstrom, J., Butchart, S., Hermes, C.
BirdLife International (2020) Species factsheet: Sayornis saya. Downloaded from http://www.birdlife.org on 30/03/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 30/03/2020.