frog eggs from the common frog, rana temporaria. several clusters lying in water in april. birkenes, norway

amphibian amphibious animal anura april aquatic biology birkenes birth breedig breeding brown clusters common creature eggs embryos european fauna fertilization forest frog frogspawn garden gelantinous horizontal jelly life many mating nature norway pond rana reproduction seasonal slimy small spawn spawning species spring springtime tadpole temporaria unhatched water wild wildlife young