froglet
US /ˈfrɑːɡ.lɪt/
UK /ˈfrɑːɡ.lɪt/

1.
a young frog, especially one that has recently developed from a tadpole and still has a tail
:
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The pond was teeming with tiny froglets.
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We observed the transformation from tadpole to froglet in our backyard pond.