Determining frog's age

[into]

It just occured to me that I don't have a clue how old Dumper (WTF) is. I'm sure he's a juvenile as he's just 2 1/2 inches from snout to vent. He was 2" when I got him in late June.

Any round-about educated guesses?

[Kurt]

Well, if you cut a leg off and count the rings.... Just kidding. I have no idea, as there are so many factors involved in the rate of growth in amphibians.

[John]

Actually it's chop the end of a toe and get a powerful light microscope and count the rings (though if it's a wild animal or it has gone through cool periods, ring counting isn't very accurate). But we wouldn't do that to our pets so I would just guess Dumper is under 6 months old.

[into]

Ha! Thanks for the replies, I knew he had to be under a year... so about when do they reach adult hood?

[John]

Depends on how much and well you feed him.

[Kurt]

According to the field guide you are correct. The Columbia spotted frog, Rana luteiventris is not found in Colorado. It is found in the Pacific Northwest.