Common frog (Rana temporaria)

A tailless amphibian with a smooth skin which tends to jump rather than walk. The pupil of the eye is horizontal ovoid, its dorsal surface (back) and flanks are very variable in colour - yellowish brown or brown but can also be olive green and some individuals can also be black, reddish or golden.

The back of the frog can also be spotted and/or striped. The ventral surface (belly) is normally dirty white or pale yellow speakled with grey or brown (male) females tend to have pale yellow to orange bellies.

The most consistent markings are the dark patch behind the eye and the strong barring on the hind limbs.

Length: 6 - 9 cm

 

Common frog Rana temporaria

Breeding and Spawn

Emerging from hibernation in late February spawning usually takes place in early March. Though occasionally the frogs will emerge sooner and spawn as early as January.

The females are ready to spawn immediately after hibernation and the animals enter into amplexus very soon after arriving at their breeding ponds.

The spawn is laid in clumps and typically consists of 300 - 400 gelatinous eggs containing black embryos with a white spot.

The very young tadpoles are black but soon become speckled brown in colouration making them distinguishable from the permanently black tadpoles of the common toad.

Text Source RAUK Forum Idenfification http://www.herpetofauna.co.uk/common_frog.htm