Leptobrachium boringii

It is endemic to China where it is found in Sichuan, Guizhou, and Hunan provinces.

[2] Its natural habitats are temperate forests, grassland, arable land, and rural gardens near rivers.

Moreover, male Leptobrachium boringii are larger, on average 75 mm (3.0 in) in snout-vent length, than females, which are on average 67 mm (2.6 in) in SVL (female-biased sexual size dimorphism is more common in frogs[4]).

These unusual features seem to relate to male–male combat for best breeding territories and/or female preference for larger males.

However, also multiple paternity could be observed, suggesting that some males use the sneaker strategy to fertilize eggs, instead of defending territories.

Leptobrachium boringii male at the height of the breeding season. Nuptial spines, the "moustache", are clearly visible. [ 3 ]