Fig. 2From: Environmental niche and flight intensity are associated with molecular evolutionary rates in a large avian radiationAssociation between temperature and mitochondrial dN molecular rates across species of the avian family Furnariidae at different intensities of UV radiation. At high UV intensities molecular rates have a negative association with environmental temperature, while at low UV intensities the association between molecular rates and temperature is positive. Colours represent mid-quartile values of UV radiation. Darker colours indicate greater values. The predicted regression lines are also coloured for each of the mid-quartile values of UV radiation. Molecular dN rates are shown normalized and under a Box-Cox transformationBack to article page