Frogs spawn in spring and tadpoles emerge in summer…but not always

I hear reports of people worrying about having tadpoles not yet metamorphosing. But this is not so unusual: for example, in a survey a few years ago of Glasgow parkland and garden ponds, 4 sites in a sample of 21 ponds had overwintering tadpoles. Common Frog tadpoles usually take about 3 months to get through…

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