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I have been interested in nature for most of my life but since I retired I spend as much time as I can exploring the nature reserves and wildlife hotspots of my adopted home, Dorset in southern England. Whilst out I record what I see and take snaps where I can (I am no photographer!) and that forms the basis of my Nature of Dorset website. When I find something new I like to research it and write about it in my nature notes, it is how I learn and hopefully you might find my notes helpful as well!

This website is for the people of Dorset interested in wildlife and for people from elsewhere interested in the wildlife of Dorset!

06 March, 2014

Common Frog: The spawn of a new day

There can be very few of us who did not watch common frog (Rana temporaria) spawn turn in to small frogs in our school days. It was many years ago now but I remember quite clearly a fish tank in the corner of our classroom at primary school with developing frogs in it. We watched as the spawn hatched in to tadpoles and then as the tadpoles grew legs and developed towards being mature frogs. One day the tank was gone! Our teacher
had decided that they were close enough to being adults that they needed to leave home ...
Towards the middle of February each year significant numbers of frogs, possibly sixty or seventy, make their way in to our garden pond and for a couple of days there is a complete frenzy of mating frogs and then silence, they are gone. Left behind are the sticky masses of spawn, lumps of small jelly balls with a black dot in the centre of each. The spawn is so vulnerable to freezing weather and in some years is lost. Then the blackbirds take their share too as the spring progresses and they have young to feed.
Despite this predation and the vagaries of the British weather there is so much spawn and so many tadpoles that many will survive and leave the pond in June to live the rest of their lives on land returning to our pond next spring to ensure the cycle continues.
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