whats this

[swrzoe]

have had tree frogs (2) for couple yrs just never noticed this looks like suction cups under his body while stuck and tucked to glass .

[UncleChester]

have had tree frogs (2) for couple yrs just never noticed this looks like suction cups under his body while stuck and tucked to glass .

It's the pelvic patch for absorbing water. The knobbly bits of skin are supposed to be highly vascularized to aid in water absorption. When they are dehydrated, you can see them 'drinking' by spreading the back legs out a little and squishing this patch and their thighs against a moist surface like soil.

Here's a spring peeper, Pseudacris crucifer, found on a glass door with the same bumpy skin, and one of my Hyla cinerea​ that shows off the bumpy thighs:

[swrzoe]

thanks interesting i have probaly 12 gals water two waterfalls lots of vegetation growing in a 55 gal tank lots of spagmun moss areas and limbs to climb on plus i spray mist into the tank occansionaly hope thats moist enough.

[swrzoe]

this is my tank and how i built it. the balisk lizard is in another cage now

[UncleChester]

If you don't have one already, you might want to get a hygrometer.

With a pool of water you probably won't often see them smush themselves into damp soil to rehydrate. This posture is a pretty common sight for wild treefrogs near me, especially during dry summer months when they rehydrate in recently watered potted plants.