Masked Tree FrogIn Images by Matt ShetzerFebruary 21, 2018A Masked Tree Frog hangs from a branch in Costa Rica. If you’ve heard of Grumpy Cat, here is Grumpy Frog.Stock Image #20160415-104646Masked Tree Frog was last modified: February 21st, 2018 by Matt ShetzerMasked Tree Frog was last modified: February 21st, 2018 by Matt Shetzer