Comparison of habitat, Mating Behavior and laying of three species of Anuran Amphibians (Rana (Pelophylax) ridibunda, Hyla savignyi and Bufo (Pseudepidalea) variabilis) in the Lorestan province

Habitat and reproductive features can be distinguished a species from other sympatric species. During one years of field work in different habitats of Lorestan province، three species of anuran amphibians (Marsh frog، Tree frog and Green toad) were compared according to the habitats and reproductive aspects (egg type، time and location of egg laying). Tree frog begins reproductive activity earlier than the other species (early April) and their eggs are attached to stems of plants in under water. The Marsh frog eggs were observed in mid-April that the egg masses stucked to the pond floor. The Green toad eggs were visible at water surface similar to the long strings in early May. Consequently، the non-synchronized reproductive could account for reproductive isolation between these three sympatric species. Weight and number of the marsh frog eggs is higher than the other two species. Also the color changes observed in the populations of these species (especially the Marsh and Tree frogs) can be due to habitat changes and environmental effects on the populations.