Because cormorants are closer relatives of gannets and anhingas ( which have no prominent gular pouch ) than of frigatebirds or pelicans, it can be seen that the gular pouch is either plesiomorphic or was acquired by parallel evolution.
12.
Because cormorants are closer relatives of gannets and anhingas ( which have no prominent gular pouch ) than of frigatebirds or pelicans, it can be seen that the gular pouch is either plesiomorphic or was acquired by parallel evolution.
13.
When breeding, both males and females develop throat pouches, known as gular pouches or gular skin, to carry food to their chicks, a trait seen in only one other North American genus, " Pinicola ".
14.
It is currently thought that the ground hornbills, along with " Tockus " and " Tropicranus ", are almost exclusively carnivorous and lack the gular pouch that allows other, less closely related hornbill genera to store fruit.
15.
Green or brownish above, with indistinct darker markings; green or brownish above, with indistinct darker markings; a black streak from the eye to above the tympanum; throat with black streaks; belly : dirty white; gular pouch : pink ( in life ).
16.
In the Arixeniina, family Arixeniidae, species of the genus " Arixenia " are normally found deep in the skin folds and gular pouch of Long-tailed pouch rats ( " Beamys " ), and " Hemimerus " which are found on Giant " Cricetomys " rats.
17.
Body compressed; dorsal scales very large, about three times as large as the median ventrals, smooth, pointing backwards and upwards; ventrals strongly keeled; 36 to 43 scales round the middle of the body; gular sac : small; scales on either side of the lower jaw feebly keeled, larger than the ventrals, those on the gular pouch smaller, more strongly keeled about as large as the ventrals.
18.
Soft-tissue remains preserved by the exceptional preservational environment of the La Hoyas lagerst�tte revealed the presence of a small skin or keratin crest on the back of the head, and a gular pouch similar to the much larger pouches found in modern pelicans, from which " Pelecanimimus " took its name . " Pelecanimimus " might have been much like a modern-day crane, wading out in lakes or ponds using its claws and teeth to capture fish and then storing them in its skin flap.
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