Abstract: An investigation in the wintertime of 2004-2005 showed that in Shanghai farmland, the underground burrows of ridges, footpaths, and ditch banks were the main hibernation sites of Rana limnocharis. More than 62.2% of the frogs hibernated with other individuals, and the frogs, with 2-6 in a burrow, shared 34.0% of the burrows. 86.6% of wintering frogs were sub-adults. R. limnocharis mainly used the existing burrows to hibernate.

Key words: Wetland, Algae ecology