Pool frog (Rana lessonae)  SizeBody length: up to 65 mm  The
pool frog is classified as Least Concern (LC) on the IUCN Red
List (1). This species is listed on Annex IV of the EC Habitats
and Species Directive.  The pool frog (Rana lessonae) was only
recognised as a distinct species as recently as 1973. It is
usually olive-brown above, with dark-brown blotches, and a
prominent yellow line running down the centre of the back. Pool
frogs from central and southern Europe are often green in
colour. Pool frogs differ in shape from the common frog, having
a more pointed snout, and they lack the dark patch behind the
eye around the eardrum.  Pool frogs can be easily confused with
two other species of frogs: the marsh frog and the edible frog
(both introduced). They are best distinguished by a combination
of characters, mainly geographic location, size, call, and to
some extent coloration. Pool frogs have a loud call, somewhat
similar to a duck quacking.  The pool frog is found across much
of central Europe, as far no