Data Zone
Justification of Red List category
This species is restricted to four small islands, on which all its subpopulations are likely to be small. Potential threats include habitat loss owing to pressure from urban development, livestock farming and wood-cutting, and predation by invasive species; however there are not currently known to be any declines in the population or the species’s habitat. It has therefore been listed as Near Threatened, but any evidence of continuing declines would likely see this species being uplisted to a higher category of threat.
Population justification
No population data are known to exist, however being present on just four small islands, it is presumed to have a very small population (perhaps fewer than 2,500 mature individuals, and likely to approach as few as 1,000 mature individuals, with fewer than 1,000 mature individuals in each subpopulation). A preliminary population estimate places the population in the band 1,000-2,499 mature individuals, however it may prove to be higher.
Trend justification
There are not known to be any declines in the population or the species’s habitat, and the population is therefore suspected to be stable.
This species is endemic to the four islands of the Islas Tres Marias group, off the central Pacific coast of Mexico (Howell and Webb 1995, del Hoyo et al. 1999).
It probably inhabits arid and semi-arid bushy woodland and scrub (Howell and Webb 1995, del Hoyo et al. 1999) on the four larger islands, but there is little direct information about its requirements.
Threats to birds on the Islas Tres Marias include urban development, livestock farming, wood-cutting and introduction of non-native species (Arizmendi and Valdelamar 2000), however there are not known to be any declines in the population or the species’s habitat. Nevertheless, it remains susceptible to human activities, the potential introduction of non-native species and stochastic events such as hurricanes.
Conservation and research actions underway
CITES Appendix II (del Hoyo et al. 2016).
Conservation and research actions proposed
Survey to obtain population and trend estimates. Study ecological requirements, and assess threats.
9-10 cm. Largely bright-green hummingbird with a bright-red black-tipped bill. The males throat is a bright turquoise green, the breast is bronzy-green and the undertail coverts are dark grey. Females are bright green with dark greyish underparts. Similar species. Broad-billed Hummingbird C. latirostris has a sapphire-blue throat and turquoise-blue breast, and paler undertail coverts. C. doubledayi has blue-black undertail coverts and extensive royal-blue underparts, as well as a blue throat and crown.
Text account compilers
Martin, R., Everest, J.
Contributors
Ashpole, J, Butchart, S., Ekstrom, J., Peterson, A.T., Symes, A. & Taylor, J.
Recommended citation
BirdLife International (2024) Species factsheet: Tres Marias Hummingbird Cynanthus lawrencei. Downloaded from
https://datazone.birdlife.org/species/factsheet/tres-marias-hummingbird-cynanthus-lawrencei on 23/11/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 23/11/2024.