Scent glands are found in the genital area of most mammals and in various other parts of the body, such as the underarms of humans and the preorbital glands of deer. They produce a semi-viscous fluid which contains pheromones. These odor-messengers indicate information such as status, territory marking, mood, and sexual power. The odor may be subliminal, not consciously detectable.

Scent glands include:

• apocrine glands, such as in the armpits of humans
• sebaceous glands, such as the tarsal glands of deer or cranial surface glands of the Red-bellied Lemur
• flank glands, such as in voles or shrews
• pockets, such as the preorbital gland
• anal scent glands, found in most carnivores and some other mammals
• castor sacs, found in beavers

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