LC
California Towhee Melozone crissalis



Justification

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 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.

Population justification
The global population is inferred to number 7.5 million mature individuals (Partners in Flight 2022).

Trend justification
The species has been undergoing a moderate decline at an average rate of 0.4% per year between 1970 and 2017 (Partners in Flight 2022). This equates to a decline of 4% over ten years. Short-term trends suggest that the population in the U.S.A. has declined by 11-15% over the past ten years, though this value is non-significant (Pardieck et al. 2018, Meehan et al. 2020).

Acknowledgements

Text account compilers
Bell, F., Hermes, C.

Contributors
Butchart, S. & Ekstrom, J.


Recommended citation
BirdLife International (2024) Species factsheet: Melozone crissalis. Downloaded from https://datazone.birdlife.org/species/factsheet/california-towhee-melozone-crissalis on 05/03/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org on 05/03/2024.