In Jurassic World one of the scientists said that tree frogs can modulate their infrared output. Is this science fiction or science fact?
Extract from wikipedia article on Multi-spectral camouflage:
"The English zoologist Hugh Cott, in his 1940 book Adaptive Coloration in Animals, wrote that some caterpillars such as the eyed hawk-moth Smerinthus ocellatus, and tree frogs such as the red-snouted treefrog Hyla coerulea, are coloured so as to blend with their backgrounds whether observed in visible light or in infra-red." (emphasys mine)
On the article there are documentation links referencing the appropiate bibliography.
According to this 1977 paper, some Glass frogs are infrared camouflaged. They can't manipulate this, but is just a natural trait of their skin. Some frogs can camouflage themselves like chameleons though.
"Two members of the glass-frog family Centrolenidae (Centrolenella fleischmanni, C. prosoblepon) and the hylid subfamily Phyllomedusinae (Agalychnis moreletii, Pachymedusa dacnicolor) reflect near-infrared light (700 to 900 nanometers) when examined by infrared color photography. Infrared reflectance may confer adaptive advantage to these arboreal frogs both in thermoregulation and infrared cryptic coloration."