List of avian species with information on the sample size, functional salt glands, kidney weight, body weight, the residual of kidney weight/body weight (K/W), habitat type.

List of avian species with information on the sample size, presence/absence (+/-) of functional salt glands (FSGs), kidney weight in grams, body weight in grams, the residual of kidney weight/body weight (K/W), habitat type (completely freshwater, mainly freshwater, mainly saline, completely saline). Data sources are shown in superscript after the species name; a superscript C indicates data collected in the current study.