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White-fronted Swift Cypseloides storeri

Justification
This species is known only from a few specimen and sight records, and there is no information on the true extent of its distribution, population size or trends. The challenges inherent in identification of neotropical swifts mean that even sight records by experienced observers should be treated with caution. Until further information is available on the species' status, it is classified as Data Deficient.

Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Stotz, D. F.; Fitzpatrick, J. W.; Parker, T. A.; Moskovits, D. K. 1996. Neotropical birds: ecology and conservation. University of Chicago Press, Chicago.

Distribution and population
Cypseloides storeri has a restricted range in south-west Mexico, where it is known only from a few sight records and six specimens taken in Guerrero (Sierra de Atoyac), Michoacán (Tacámbaro) and Jalisco (Sierra de Manantlán and Juanacatlán) (Navarro et al. 1992, Navarro et al. 1993, Ibánez-Hernández et al. 2003). The most recent published observations are of a single individual believed to be this species in a mixed flock of c.100 swifts near Tacámbaro in September 1995 (Howell et al. 1997), a record of several birds showing features of C. storeri within a flock of C. rutilus near Manzanillo, Colima in February 2002 (Tobias et al. 2006, D. Lane in litt. 2006) and another possible single at Teotitlan del Valle, Oaxaca in March 2010 (Howell 2011). Unpublished records include "one about 5km south of Tacámbaro in July 2009" (M. Patten per J. King in litt. 2010, 2011), "at least 2-3 at an apparent colony at Tacámbaro on 17-18 June 2010" (J. King in litt. 2010, 2011) and several photographed at Rancho Primavera, El Tuito, Jalisco in 24 January 2012 (B. Gibbons per J. King in litt. 2012).

Population justification
Partners in Flight estimated the population to number fewer than 50,000 individuals (A. Panjabi in litt. 2008), thus it is placed in the band 20,000-49,999 individuals here.

Trend justification
The population trend is difficult to determine because of uncertainty over the species's ecological requirements.

Ecology
It has been collected at 1,500-2,500 m in montane forest and transition pine-oak / dry tropical deciduous forest in areas with numerous waterfalls and ravines (del Hoyo et al. 1999). The Tacámbaro sighting involved a mixed flock of swifts flying over hills and fields bisected by a narrow, steep-sided canyon. Well documented records are from February, June, July and September, indicating that the species may be sedentary (Tobias et al. 2006). The specimen taken in June had enlarged testes indicative of breeding (Ibánez-Hernández et al. 2003).

Threats
Unknown.

Conservation actions underway
None is known.

Conservation actions proposed
Carry out surveys in potentially suitable habitat near historical sites and elsewhere in south-west Mexico. Clarify its ecological requirements and migratory status.

References
Navarro, A. G.; Peterson, A. T.; Escalante, B. P.; Benítez, H. 1992. Cypseloides storeri, a new species of swift from Mexico. Wilson Bulletin 104: 55-64.

Navarro, A. G.; Benítez, H.; Sanchez, V.; García, S.; Santana, E. 1993. The White-faced Swift in Jalisco, Mexico. Wilson Bulletin 105: 366-367.

Howell, S. N. G.; Snetsinger, P. B.; Wilson, R. G. 1997. A sight record of White-fronted Swift Cypseloides storeri in Michoacán, Mexico. Cotinga: 23-26.

Chantler, P. 1998. The migratory status of White-fronted Swift Cypseloides storeri. Cotinga: 40.

del Hoyo, J.; Elliott, A.; Sargatal, J. 1999. Handbook of the Birds of the World, vol. 5: Barn-owls to Hummingbirds. Lynx Edicions, Barcelona, Spain.

Ibánez-Heernández, G.; Benítez-Diaz, H.; Peterson, A. T.; Navarro, A. G. 2003. A further specimen of the White-fronted Swift Cypseloides storeri. Bulletin of the British Ornithologists' Club 123: 62-4.

Tobias, J. A.; Butchart, S. H. M.; Collar, N. J. 2006. Lost and found: a gap analysis for the Neotropical avifauna. Neotropical Birding: 4-22.

Further web sources of information
View photos and videos, and hear sounds of this species from the Internet Bird Collection

Text account compilers
Benstead, P., Capper, D., Isherwood, I., Sharpe, C J, Symes, A.

Contributors
Gibbons, B., King, J., Lane, D., Patten , M.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2013) Species factsheet: Cypseloides storeri. Downloaded from http://www.birdlife.org on 20/06/2013. Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/06/2013.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Additional resources for this species

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Key facts
Current IUCN Red List category	Data Deficient
Family	Apodidae (Swifts)
Species name author	Navarro, Peterson, Escalante & Benitez D., 1992
Population size	mature individuals
Population trend	Unknown
Distribution size (breeding/resident)	84,500 km²
Country endemic?	Yes
Links to further information
- Additional Information on this species