# sRGB Reflectances from Iberian butterflies [https://doi.org/10.5061/dryad.1g1jwsv0q](https://doi.org/10.5061/dryad.1g1jwsv0q) Data on wing reflectance (visible spectrum, mean standard RGB values (243.7= white, to 52= black) from 224 species of butterflies (Lepidoptera, Papilionoidea): 223 from the Iberian Peninsula and one (*C. webbianus*) from the Canaries. Average of male and female, sample size as indicated in column n. The data from *C. webbianus* and *C. marshalli* were not included in our analyses of reflectance. Text file, CSV format, columns delimited by periods, 225 rows (including headings) and 38 columns. Any means presented are weighted averages taking into account the areas of the parts involved. Wing reflectances refer to the parts of the wings exposed in a living butterfly (except FW\_AREA and HW\_AREA which are total wing surfaces). * **Ord**, row number (roughly a taxonomic arrangement) * **Species**, species name (abbreviated genus, contains a blank space, e.g., *Heteropterus morpheus*) * **N**, sample size * **FWL**, forewing length (mm) * **DFT**, reflectance, dorsal forewing * **DFp**, reflectance, dorsal forewing, proximal area * **DFd**, reflectance, dorsal forewing, distal area * **DHT**, reflectance, dorsal hindwing * **DHp**, reflectance, dorsal hindwing, proximal area * **DHd**, reflectance, dorsal hindwing, distal area * **DB**, reflectance, dorsal body area * **D(Tp+B)**, reflectance of the exposed dorsal body plus proximal wing surfaces * **DT**, reflectance of the dorsal areas (body plus whole wing) * **DTp**, reflectance of the dorsal, proximal wing areas * **DTd**, reflectance of the dorsal, distal wing areas * **VFT**, reflectance, ventral forewing * **VFp**, reflectance, ventral forewing, proximal area * **VFd**, reflectance, ventral forewing, distal area * **VHT**, reflectance, ventral hindwing * **VHp**, reflectance, ventral hindwing, proximal area * **VHd**, reflectance, ventral hindwing, distal area * **VB**, reflectance, ventral body area * **V(Tp+B)**, reflectance of the exposed ventral body plus proximal wing surfaces * **VT**, reflectance of the ventral areas (body plus whole wing) * **VTp**, reflectance of the ventral, proximal wing areas * **VTd**, reflectance of the ventral, distal wing areas * **Mean**, mean total reflectance (dorsal and ventral surfaces) * **p\_Mean**, mean reflectance of the proximal (dorsal and ventral) wing areas * **p\_Otimum**, mean reflectance of the proximal dorsal (for dorsal baskers) or ventral (for lateral basking species) wing areas. * **FW\_area**, total forewing area (mm2) * **HW\_area**, total hindwing area (mm2) * **T\_Mean\_Iberia\_10km**, Iberian mean species temperature, Centigrade degrees, 10 x 10 km resolution * **P\_Mean\_Iberia\_10km**, mean species annual precipitation, mm, Iberian Peninsula, 10 x 10 km resolution * **T\_Mean\_Ibera\_50km**, mean species temperature, Centigrade degrees, Iberian Peninsula, 50 x 50 km resolution * **P\_Mean\_Iberia\_50km**, mean species annual precipitation, mm, Iberian Peninsula, 50 x 50 km resolution

Data on wing reflectance (visible spectrum, mean standard RGB values (243.7= white, to 52= black) from 224 species of butterflies (Lepidoptera, Papilionoidea): 223 from the Iberian Peninsula and one (Cyclyrius webbianus) from the Canary Islands. Average of male and female, sample size as indicated in column n. The data from C. webbianus and Cacyreus marshalli are provided although these species were not included in our analyses of reflectance.

The data were measured from digital images of set (collection) specimens taken in fixed conditions, with grey (average RGB) values standardized a posteriori to fit the scale white= 243.7= white, to black= 52. The data set includes the mean length of the forewing (mm) and the total areas (mm2) of the fore and hind wings.