The eastern Junggar Basin in northwest China is a potential area of sympatry for breeding Long-legged Buzzards (Buteo rufinus) and Upland Buzzards (B. hemilasius). However, during a breeding season survey in 2005, the Long-legged Buzzard was the only species recorded present in this semidesert region. The minimum breeding density within our survey area was 0.19 breeding pairs/100 km2 and all nests were located either on rock faces or clay cliffs. There was little overlap in the location of Long-legged Buzzard and Golden Eagle nest sites, possibly as a result of interspecific competition. We present here information on clutch size (mean = 3.3 eggs), brood development, and fledging success (0.7 chicks per breeding pair), as well as on the diet during the breeding season. Mammalian prey, especially the great gerbil (Rhombomys opimus), made up most of the diet of Long-legged Buzzards.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.