Figure 5. Spectral reflectance of dorsal coloration as a function of wavelength for a+b) Agalychnis callidryias, c+d) Litoria caerulea and e+f) Hyla arborea.

Spectra were calculated from HSD data cubes from selected regions of interest. Shown are both reflectance in a+c+e) from 400 to 1000 nm (VIS and NIR) and b+d+f) in the range from 1000–2500 nm (SWIR). The VIS/NIR spectrum was calculated for a homogeneous area of dorsal skin from 4794, 246 and 443 pixels for Litoria caerulea, Agalychnis callidryas and H. arborea respectively. The SWIR spectrum was calculated for a homogeneous area of dorsal skin from 980, 362 and 273 pixels.