Abstract
Offspring survival is critical to bird conservation and understanding avian life history. We monitored 73 nests belonging to six Passeriformes species in Ikh Nart Nature Reserve, Mongolia in 2017 and 2018. The study focused on nest site selection for breeding visitors and resident avian species in relation to habitat types found in arid environments, such as rocky outcrops and open steppe. Egg laying period varied among the species. Those that nested in the rocky outcrops realized higher reproductive success. The offspring survival decreased in ground-nesting birds after hatching. Resident species, including Rock Sparrow (Petronia petronia), Mongolian Finch (Bucanetes mongolica), and Horned Lark (Eremophila alpestris), showed lower reproductive success during the first half of the season, while breeding visitors, including Northern Wheatear (Eremophila alpestris), Isabelline Wheatear (Oenanthe isabellina), and Pied Wheatear (Oenanthe pleschanka), saw higher reproductive success. Rocky outcrops near water sources in arid environments play an important part in the breeding success of rock-dwelling birds.
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