noun
dewlap; gular pouch
Refers to the loose skin or pouch under the throat of certain animals, such as lizards, birds, or cattle.
イグアナの喉袋は、体温調節や求愛に使われる。
The iguana's dewlap is used for thermoregulation and courtship.
鳥の喉袋は、食べ物を一時的に蓄えるのに役立つ。
A bird's gular pouch helps temporarily store food.
喉 means 'throat' in general, while 喉袋 specifically refers to the external pouch or dewlap.
Compound of 喉 (のど, 'throat') and 袋 (ふくろ, 'bag, pouch'), literally 'throat pouch'.