Jackson's chameleon

Jackson's chameleon (Trioceros jacksonii) is an East African chameleon species whose males typically bear three prominent facial horns. Females give birth to live young rather than laying eggs.

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Chameleon: A family of lizards known for independently moving eyes, grasping feet, long projectile tongues, and color-changing skin. Jackson's chameleon belongs to this distinctive lizard family.
Chameleon color change: A chameleon's adjustment of skin appearance through changes in light-reflecting skin structures and pigments. This species changes color, though not simply to match any background.
Frederick John Jackson: A British administrator and naturalist who collected and studied wildlife in East Africa. The species' name honors this explorer and naturalist.
Vivarium: An enclosed space designed to maintain living plants or animals under managed environmental conditions. Captive care requires a ventilated enclosure with suitable climbing structure and climate.
Trioceros: A genus of African chameleons that includes Jackson's chameleon and several related horned species. This is the genus containing Jackson's chameleon.
Chameleon tongue: A muscular, rapidly projected tongue used by chameleons to capture prey. It catches insects with the specialized feeding mechanism shared by chameleons.
George Albert Boulenger: A Belgian-British zoologist who described and classified thousands of reptiles, amphibians, and fishes. He formally described Jackson's chameleon in 1896.
Reptile keeping: The practice of housing and caring for reptiles in captivity. Jackson's chameleons are kept in captivity, but their specific climate needs complicate care.
Sexual dimorphism: Consistent differences in appearance or other traits between males and females of a species. The prominent horns are chiefly a male trait in this species.
Chameleon feet: Grasping feet with opposing bundles of toes that help chameleons cling to branches. Their opposing toes aid movement through the species' arboreal habitat.