during a five years survey in markazi province, 136 species related to 42 bird's family have been identified, that include 27% of the birds' species and 58% of the birds families of iran. (iranian birds). 36% of birds were endemic and 64% were migrant. cosidering the species variety in markazi province, sylvidae family is number one. the population of corvidae family are more than oth...

Phylogenetic relationships were studied in the genus Cyanocorax (Aves: Corvidae) and related genera, Psilorhinus and Calocitta, a diverse group of New World jays distributed from the southern United States south to Argentina. Although the ecology and behavior of some species in the group have been studied extensively, lack of a molecular phylogeny has precluded rigorous interpretations in an ev...

Evidence is accumulating on the regular and systematic Neanderthal exploitation of birds. However, motivations, mechanisms, circumstances underlying this behavior remains little explored despite their potential implications ecology capabilities. Fossil choughs ( Pyrrhocorax , Corvidae) are among most abundant in cave sites with Mousterian technology. We reviewed evidence showing that Neandertha...

Phylogenetic analysis of cytochrome-b sequences and cranial osteological characters for nine genera of corvine passerine birds supports the hypothesis that the two major groups of birds of paradise, the manucodines and paradisaeinines, constitute a monophyletic group and that their postulated sister group is the Corvidae (crows, jays, and allies). The data are also consistent with the hypothesi...

Barred Owls (Strix varia) expanded their range to include western North America and have been competing with federally threatened Northern Spotted Owls (S. occidentalis caurina) for the past few decades. To help protect Spotted Owls, the US Fish and Wildlife Service is considering conducting a 3to 10-y study in which as many as 2150 to 4650 Barred Owls would be killed and, possibly, conducting ...

1. Previous studies have demonstrated that wind dispersal is an effective mode of seed dispersal for pines ( Pinus , Pinaceae) with seeds weighing <90 mg, but not for largerseeded ( ≥ 90 mg) pines. Consequently, most large-seeded pines rely on birds in the family Corvidae for seed dispersal, but some do not, and most of their seeds fall near the parent tree. Why seeds of these pines are not dis...

This report will review the similarities and differences of four species of pine seed caching members of the avian family Corvidae that live on the slopes and base of the San Francisco Peaks in north-central Arizona. The four species include the Clark’s nutcracker (Nucifraga columbiana), pinyon jay (Gymnorhinus cyanocephalus), western scrub-jay (Aphelocoma californica), and Mexican jay (A. ultr...