preorbital gland

zoology

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July 19, 2026

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The preorbital gland is a type of scent gland found in certain mammals, primarily artiodactyls (even-toed ungulates). These glands are located just in front of the eyes and play a role in communication, particularly in territorial marking.12

In species like the bontebok and Thomson's gazelle, secretions from the preorbital glands are deposited on vegetation along territory borders. This scent marking helps advertise the territory to other animals. The complexity of these secretions likely aids in individual recognition and indicates the freshness of the mark. While the exact function of all scent glands is not fully understood, preorbital glands are a key component in the chemical communication systems of many mammals.21

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chemoreception
Territorial behavior
However, the preorbital glands, located on the side of the face with an opening just in front of the eyes, are the best known in relation to territorial behavior. In species such as the South African bontebok, the preorbital glands are larger in males than in females.…
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However, the preorbital glands, located on the side of the face with an opening just in front of the eyes, are the best known in relation to territorial behavior. In species such as the South African bontebok, the preorbital glands are larger in males than in females.…
Read More