Swifts and Hummingbirds: Apodiformes
Some species of swifts and hummingbirds face threats to their survival, according to the World Conservation Union (IUCN). Nine hummingbird species are Critically Endangered, facing an extremely high risk of extinction, as their habitat is lost due to development, farming, and logging. Six hummingbird and swift species are Endangered, facing a very high risk of extinction. Brown tree snakes accidentally brought to Guam by ships ate many of these birds on the island. Other swiftlets died when pesticides were sprayed to kill insects.
FOR MORE INFORMATION
Attenborough, David. The Life of Birds. Princeton, NJ: Princeton University Press, 1998.
Baicich, Paul J., and Colin J. O. Harrison. A Guide to the Nests, Eggs and Nestlings of North American Birds. San Diego, CA: Academic Press, 1997.
Sibley, David, Allen. The Sibley Guide to Birds. New York: Alfred A. Knopf, 2000.
Wells, Diana. 100 Birds and How They Got Their Names. Chapel Hill, NC: Algonquin Books, 2002.