NOTES 
Shealer, D. 1999. Sandwich Tern ( Sterna sandvicensis), in The Birds of North 
America (A. Poole, ed.). Ithaca: Cornell Laboratory of Ornithology, N.Y. 
Singer, D. S., and Terrill, S. B. 2009. The 33 rd report of the California Bird Records 
Committee: 2007 records. W. Birds 40:158-190. 
Tobon, E. D. 1992. Ecologia reproductiva de la golondrina-marina elegante ( Sterna 
elegans) con enfasis en la conducta dentro de las guarderias. B.S. Thesis, Facultad 
de Ciencias, Univ. Nacl. Autonoma Mex., Mexico, D.F. 
Velarde, E., and Anderson, D. W. 1993. Conservation and management of seabird 
islands in the Gulf of California: Setbacks and successes, in Seabirds on Islands: 
Threats, Case Studies and Action Plans (J. Burger, M. Gochfeld, and D. Nettle- 
ship, eds.), pp. 721-765. Int. Council Bird Preservation, Cambridge, England. 
Velarde, E., Cartron, J.-L. E., Drummond, H., Anderson, D. W., Rebon Gallardo, F., 
Palacios, E., and Rodriguez, C. 2005. Nesting seabirds of the Gulf of California’s 
offshore islands: Diversity, ecology and conservation, in Biodiversity, Ecosystems, 
and Conservation in Northern Mexico (J.-L. E. Cartron, G. Ceballos, and R. S. 
Felger, eds.), pp. 452-470. Oxford Univ. Press, New York. 
Accepted 24 April 2009 
233 
