Howard, the picture is difficult to tell but think I detect a slight hint of red in the tail. If that is true I believe also that they are young Leapord frog tadpoles. The same year I stocked my pond there were thousands of these but I only see a few anymore. I don't know if I could differentiate the Cricket frog tadpole from the Leapord other than size but in comparison Bullfrog tadpole are 4 times the size of what I believe are the Leapord tadpoles. Likewise, since Leapord frog is 4 times the size, if not more, than Cricket frog the tadpoles would probably follow suit.
Hope this helps. If you have young children have them raise some. Maybe that's what I should have my kids do, might make a good archive subject.
FH
