Title: Dataset for “Does the use of nest materials in a ground-nesting bird result from a compromise between the risk of egg overheating and camouflage?” File 1: textures.txt Year: Year of data Nest: Identification number of nest Treatment: White, light grey, dark grey pebbles, or twigs Picture: Original, immediately after treatment, or one week after treatment ChiSq (Egg_Nest): Comparing histogram of textures between egg and nest using ?? ChiSq (Egg_Microhabitat): Comparing histogram of textures between egg and microhabitat using ?? ChiSq (Nest_Microhabitat): Comparing histogram of textures between nest and nest using ?? Border ratio: Proportion (%) of detected border File 2: egg_temperatures.txt Replicate: Ten replicates for each nest materials Time (s): Time in seconds from the first measure of temperature Egg temperature (ºC): Egg temperature in ºC Material: White, light grey, dark grey pebbles, or twigs Egg identity: Identification number of model egg (four different eggs) File 3: lightness_txt Year: Year of data Nest: Identification number of nest Egg lightness: In Lab colour space Nest lightness: In Lab colour space Microhabitat lightness: In Lab colour space File 4: material_reflectances.txt Replicate: Five replicates for each nest material Nest material: White, light grey, dark, ochre grey pebbles, twigs or dry mud R: Reflectance of nest material in channel R using the tool SpotEgg (Gómez and Liñán-Cembrano, 2017) G: Reflectance of nest material in channel G using the tool SpotEgg (Gómez and Liñán-Cembrano, 2017) B: Reflectance of nest material in channel B using the tool SpotEgg (Gómez and Liñán-Cembrano, 2017) Total reflectance: Average reflectance of R, G, and B File 5: material_temperatures.txt Time (s): Time in seconds from the first measure Replicate: Five replicates for each material Nest material: White, light grey, dark, ochre grey pebbles, twigs or dry mud Temperature (ºC): Temperature in ºC of the material measured with a thermal imaging camera File 6: not_removed.txt Treatment: White, light grey, dark grey pebbles, or twigs % of experimental material remained in nest: Experimental material retained in the nest a weak after treatment in %