In article .com,
says...
My pond has been build solely for - frogs, toads and newts - it
does not have any fish in it. It has sun and shade, plants and looking
at last years calendar the tads had legs this time last year - what
could have happened?


I've seen a couple of articles mentioning the lack of predation and no
stress, such as when the water source is drying up, will keep them in
the tadpole stage longer....sounds like a happy tadpole is a legless
tadpole.
--
Lar

It is said that the early bird gets the worm,
but it is the second mouse that gets the cheese.