Fig. 1
From: Reflection of near-infrared light confers thermal protection in birds
Near-infrared (NIR) reflectance variation in Australian birds. a Reflectance spectra for representative species with relatively high (light grey and orange) and low (blue and black) NIR reflectivity. Grey: Nankeen kestrel (Falco cenchroides, crown); orange: azure kingfisher (Alcedo azurea, belly); blue: superb fairy-wren male (Malurus cyaneus, mantle); and black: great cormorant (Phalacrocorax carbo, belly). Species drawings taken with permission from ref. 31. b Visible (left) and NIR (right) photographs of specimens with high (azure kingfisher) and low (superb fairy-wren) relative NIR. c Average relative NIR per species (across dorsal patches) mapped onto a phylogenetic tree (random example from the 1000 trees used in analysis), branch colours represent the value of relative NIR for each species. Vertical bars represent avian order, and correspond to the colour silhouettes on top of the branches
