Bergmann’s rule and Allen’s rule in two passerine birds in China by Liqing Fan, Tianlong Cai, Ying Xiong, Gang Song, Fumin Lei

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Factors determining species richness patterns of breeding birds along an elevational gradient in the Horn of Africa region by Ahunim Fenitie Abebe, Tianlong Cai, Melaku Wale, Gang Song, Jon Fjeldså, Fumin Lei

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Ecological constraints on elevational gradients of bird species richness in Tajikistan by Dilshod Akhrorov, Tianlong Cai, Gang Song, Ping Fan, Ahunim Fenitie Abebe, Peng He, Fumin Lei

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