So tiny, they easily avoid being seen...
I am wondering if the odd coloration of the one frog may have resulted from time spent perched on a pink hydrangea bloom?
These tiny tree frogs are so cute. Really sharp image you got with two frogs side by side.
The colouring may be due to exposure to the sun, I don't think they change colour with what they are sitting on or what they eat. You must have a healthy garden that is good habitat for our native tree frogs.
Heather