Castoreum is a yellowish exudate from the castor sacs of mature beavers used in combination with urine to scent mark their territory. Both beaver sexes have a pair of castor sacs and a pair of anal glands, located in two cavities under the skin between the pelvis and the base of the tail.
Castoreum is a yellowish exudate from the castor sacs of mature beavers used in combination with urine to scent mark their territory. Both beaver sexes have a pair of castor sacs and a pair of anal glands, located in two cavities under the skin between the pelvis and the base of the tail.
Source: Wikipedia "Castoreum" · CC BY-SA 4.0
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