Peregrine Falcon Falco peregrinus Tunstall       Field Guide IDs: NG-124; G-80; PE-162; PW-pl 17; AE-pl 315; AW-pl 323; AM(I)-260 Nest Location Nest Type Eggs & Mating System Dev. & Parental Care Primary & 2ndary Diet.. Foraging Strategy F -M I: 29-32 DAYS SEMIALTRICIAL 2 TREE 50 feet - 200 feet + F 3-4 (2-6) MONOG F: 35-42 DAYS MF BREEDING: Open habitats from tundra, savanna, and seacoasts to high mountains; also open forest, tall buildings. 1 brood. DISPLAYS: Aerial displays, courtship feeding, all with calls. NEST: Well-rounded scrape in accumulated debris on ledge, occ lined with grass. Rarely uses old tree nest or cavity. Cliff sites used traditionally for many years. EGGS: White/pinkish-cream, occ marked with brown/red. 2.1" (53 mm). DIET: Stoops or flies fast and low after wide variety of birds, esp doves and pigeons, also shorebirds, waterfowl, and passerines. CONSERVATION: Winters s through C.A. and West Indies to Tierra del Fuego. Endangered Species (arctic sub-species Threatened); de-listed in 1999; serious decline since 1940s result of eggshell thinning from pesticides and PCB poisoning. Now being reintroduced to parts of former range. NOTES: Worldwide range more extensive than any other bird. Initially male does most of hunting, female broods and feeds chicks. Pairs roost together, hunt cooperatively. As in other falcons, female larger than male: eats first, dives first when hunting in pairs, takes larger prey. STANFORD. NOTES: Occasionally seen perched on Hoover Tower; seen March 2011, last seen February 2013. Similar Species: Prairie Falcon ESSAYS: Conservation; Birds and the Law; How Fast?; Raptor Hunting; Size and Sex; Courtship Feeding. REFERENCES: Cade, 1982; Cade et al., 1971; Craig, 1986; Cramp and Simmons, 1980; Ratcliffe, 1980; Temple, 1978.