This week I’m writing about things that go peep, croak and brr-wum in the night. If you’ve ever been near water at dusk or at night, you know what I’m talking about. We’re talking about frogs.

All male frogs sing to attract mates, Maggie said, noting that each species has a distinctive song — the duck-like quack of the northern wood frog, the watery snore of a pickerel frog, and the ...