A study of the seasonal changes in avian testesArchivado el 16 de marzo de 2009 en Wayback Machine. Alexander Watson, J. Physiol. 1919;53;86-91, 'greenfinch (Carduelis chloris)', 'In early summer (May and June) they are as big as a whole pea and in early winter (November) they are no bigger than a pin head'
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"Drinking Behavior of Mousebirds in the Namib Desert, Southern Africa "; Tom J. Cade and Lewis I. Greenwald; The Auk, V.83, No. 1, January, 1966 pdfArchivado el 1 de diciembre de 2011 en Wayback Machine.
"Drinking Behavior of Sandgrouse in the Namib and Kalahari Deserts, Africa"; Tom J. Cade, Ernest J. Willoughby, and Gordon L. Maclean; The Auk, V.83, No. 1, January, 1966 pdfArchivado el 20 de marzo de 2009 en Wayback Machine.
"Drinking Behavior of Mousebirds in the Namib Desert, Southern Africa "; Tom J. Cade and Lewis I. Greenwald; The Auk, V.83, No. 1, January, 1966 pdfArchivado el 1 de diciembre de 2011 en Wayback Machine.
"Drinking Behavior of Sandgrouse in the Namib and Kalahari Deserts, Africa"; Tom J. Cade, Ernest J. Willoughby, and Gordon L. Maclean; The Auk, V.83, No. 1, January, 1966 pdfArchivado el 20 de marzo de 2009 en Wayback Machine.
A study of the seasonal changes in avian testesArchivado el 16 de marzo de 2009 en Wayback Machine. Alexander Watson, J. Physiol. 1919;53;86-91, 'greenfinch (Carduelis chloris)', 'In early summer (May and June) they are as big as a whole pea and in early winter (November) they are no bigger than a pin head'