These species included the Cooper's hawk (Accipiter cooperii), red-tailed hawk (Buteo
jamaicensis), American kestrel (Falco sparverius), turkey vulture (Catlwrtes aura), great horned owl (Bubo virginianus), barred owl (Strix varia), and eastern screech owl (Megascops asio).
Droppings from 149 birds were evaluated and divided into two groups: captive (n = 109): Rhea americana araneipes (15), Primolius maracana (10), Ara ararauna (11), Ara chloropterus (10), Anodorhynchus hyacinthinus (8), Amazona aestiva (18), Ara macao macao (7), Ramphastos toco (4), Sarcoramphus papa (4), Busarellus nigricollis (2), Bubo virginianus nacurutu (3), Buteogallus coronatus (1), Buteogallus urubitinga urubitinga (3), Spizaetus melanoleucus (2), Spizaetus ornatus ornatus (3), Buteo
albonotatus (4), Geranoaetus albicaudatus albicaudatus (1), Rupornis magnirostris magnirostris (2) and Harpia harpyja (1), and quarantined birds (n = 40): Amazona aestiva (32) and Eupsitulla aurea (8) according to Clements et al.
Induction of mydriasis with the use of topical rocuronium bromide is reported in the common buzzard (Buteo buteo
), little owl (Athene noctua) (BARSOTTI et al., 2010a), tawny owl (Strix aluco) (BARSOTTI et al., 2010b) and European kestrel (Falco tinnunculus) (BARSOTTI et al., 2012) without adverse side effects.
The retinae used for this study were taken from the right eyeballs of two specimens of diurnal raptors [(buzzard (Buteo buteo
), kestrel (Falco tinnunculus)] and two specimens of nocturnal raptors [little owl (Athene noctua), and tawny owl (Strix aluco)].
meridionale) as a new species from the common buzzard (Buteo buteo
Alauda arvensis, Calandrella rufescens, Haliaeetus albicilla, Ptyonoprogne rupestris and Turdus philomelos species reported to be local residents by Jonnson (2006) were found to be summer migrants, while Buteo buteo
, reported to be summer migrant, was found to be local resident.
However, on two occasions raptors were seen to strike grouse (peregrine and goshawk Accipiter gentilis each once) and raptors were flushed from freshly killed grouse on 15 occasions: peregrine and buzzard Buteo buteo
(each 5), goshawk (3), and hen harrier and spar-rowhawk Accipiter nisus (each 1).
"Several species of predators such as Bonelli's eagles, long-legged buzzards (Buteo
rufinus), goshawks, are found poisoned each year while placing poison baits also kills other species such as partridges, ducks, rabbits and mouflons," the Game Service said.
The grasslands are also important for raptors, especially for the most common species--common buzzard (Buteo buteo
) (Skibbe 2009, Skibbe et al.
Histomoniasis is a disease almost exclusively of birds in the order Galliformes, but Histomonas has been reported from the intestinal tracts of burrowing owls in Brazil and a common buzzard (Buteo buteo
) in Turkey (Davidson, 2008; Ozmen et al., 2009; Andery et al., 2013).
Ferruginous hawks (Buteo
regalis, FEHA) that migrate through and winter in central and southern plains in the United States and eastern Mexico prey on black-tailed prairie dogs (Cynomys ludovicianus, BTPD; Plumpton and Andersen, 1997; Bak et al, 2001).