Are you sure it is the babies that are croaking or just more adults showing up
to breed?
Regardless you can not get a frog to shut up if it is going to croak - law of
nature, fish gotta swim, birds gotta fly, frogs gotta croak.
And how to catch them? Spotlight them at night and scoop them up in a net.
Release them in a natural waterway.
k30a
and the watergardening labradors
http://www.geocities.com/watergarden...dors/home.html