Geographic variation in vocalizations and evolution of North American pine grosbeaks. Manwell, R.D. 1955. The occurrence of blood Protozoa in 17 species of Fringillidae. Top of this page White-Crowned Sparrow Baker, M.C. 1975. Baker, M.C., K.J. Spitler-Nabors, and D.C. Bradley.
Early experience determines song dialect responsiveness of female sparrows.
Top of this page Blackbirds and Orioles Red-Winged Blackbirds Carey, C. 1986. Tolerance of variation in eggshell conductance, water loss, and water content by red-winged blackbird embryos. You are the 626th visitor to this page since 21 Jan 2000.