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physoc.org
jp.physoc.org
A study of the seasonal changes in avian testesDiarsipkan 2009-03-16 di 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'
"Bird lungs". Diarsipkan dari versi asli tanggal 2007-03-11. Diakses tanggal 2012-11-27.
unm.edu
elibrary.unm.edu
"Drinking Behavior of Mousebirds in the they are warm blooded. Namib Desert, Southern Africa "; Tom J. Cade and Lewis I. Greenwald; The Auk, V.83, No. 1, January, 1966 pdfDiarsipkan 2011-12-01 di 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 pdfDiarsipkan 2009-03-20 di Wayback Machine.
"Bird lungs". Diarsipkan dari versi asli tanggal 2007-03-11. Diakses tanggal 2012-11-27.
"Drinking Behavior of Mousebirds in the they are warm blooded. Namib Desert, Southern Africa "; Tom J. Cade and Lewis I. Greenwald; The Auk, V.83, No. 1, January, 1966 pdfDiarsipkan 2011-12-01 di 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 pdfDiarsipkan 2009-03-20 di Wayback Machine.
A study of the seasonal changes in avian testesDiarsipkan 2009-03-16 di 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'