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High nest predation is often found in tropical birds, though data from tropical limestone regions are lacking. In a limestone karst rainforest of south China, two species of babblers breed in rock cavities in different seasonal periods: the endangered Nonggang Babbler (Stachyris nonggangensis) breeds in May, like most birds, and the common Streaked Wren Babbler (Napothera brevicaudata) breeds in March...
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