Fresh wood frog eggs are very easy to spot......
|wood frog eggs masses - freshly laid|
|wood frog egg masses - newly hatched|
|close up of wood frog egg mass - freshly laid|
Due to the transparent gelatin-like coating, embryo development can be followed from fertilization through hatch. The embryo (black ball at center of egg in left photo) begins to elongate and grow into tadpoles. The eggs hatch before the tadpoles are able to swim, so they remain in or on the egg masses for several days (see below).
Wood frog eggs hatch 4 to 28 days after being laid. Embryonic development is temperature dependent, so timing of hatch varies with weather conditions.