Taken on 03/02/2009
I observed 8-10 pelicans actively reversing the pouch with the support of the chest for five seconds or so at a time. During this behaviour a yellow liquid secretion was visible. I think maybe that liquid was used to lubricate the inner pouch and that the stretching was possibly to give sunlight and air directly to the inner side of the pouch. Pelicans are known to excrete a highly concentrated salt solution to get rid of excess salt.
Equipment
Nikon d 300 80-400 nikon lens
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