Justification of Red List Category
This species has a very 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). Despite the fact that the population trend appears to be decreasing, the decline is not believed to be sufficiently rapid to approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is very 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.
This species has undergone a large and statistically significant decrease over the last 40 years in North America (-70.3% decline over 40 years, equating to a -26.1% decline per decade; data from Breeding Bird Survey and/or Christmas Bird Count: Butcher a.
Ammodramus maritimus is endemic to south-eastern U.S.A. and extreme north-eastern Mexico (del Hoyo et al. 2011). The subspecies nigrescens recently went extinct, the last record coming from 1980 (Walters 1992).
Text account compilers
Butchart, S., Ekstrom, J., Khwaja, N. & Ashpole, J
BirdLife International (2021) Species factsheet: Ammospiza maritima. Downloaded from http://www.birdlife.org on 29/11/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 29/11/2021.