Barking Treefrog (Hyla gratiosa) (Identification courtesy of my son Sam, full-time med student, part-time Herpetologist and naturalist)
A Tree Frog of some type, perched on some vegetation. This was in an indoor exhibit, with very dim lighting. Canon 100/f2.8, ISO 200 (I forgot to switch to ISO 100!), f/8.0, 1/200 (using built-in flash) (hand-held).