Why the iconic Thomson's gazelle is no longer classified as a true gazelle
In short: Long considered a classic member of the genus Gazella, the Thomson's gazelle has been reclassified into the genus Eudorcas. This shift reflects modern genetic research suggesting that what we call gazelles actually evolved from several distinct ancestors, forcing specialists to redraw the family tree of these nimble African antelopes.
For decades, the Thomson's gazelle was grouped within the genus Gazella, a category traditionally containing 14 species. However, advancements in genetic techniques have revealed a more complex evolutionary history. Taxonomists now believe these animals stem from multiple ancestral lines. Consequently, the Thomson's gazelle, along with the red-fronted and Mongalla gazelles, has been moved into the genus Eudorcas. This taxonomic revision highlights the difference between traditional morphological classification and modern phylogenetic analysis.
The Thomson's gazelle, affectionately known as the tommie, remains a hallmark of the East African savanna, particularly within the Serengeti ecosystem. These medium-sized antelopes are highly adapted to their environment, capable of reaching speeds of 40 miles per hour to evade predators like cheetahs. Their survival strategy relies on agility and endurance; while cheetahs may be faster in short bursts, the gazelle can outlast them in longer chases and execute sharp, zigzagging turns to escape.
Beyond their speed, these animals exhibit fascinating social and territorial behaviors. Males use preorbital glands located near their eyes to deposit a sticky black secretion on twigs and grass, effectively marking their territory. They are also gregarious, often forming herds that fluctuate in size based on the season. During the rainy season, thousands may gather, while in drier periods, they may shift their diet toward browse, such as foliage and seeds from woody plants, to maintain their hydration without needing to drink water directly.
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Sources
- Summary by Intellect · source: Thomson’s gazelle | mammal | Britannica
- Also: Thomson's Gazelle | National Geographic
- Also: Thomson's gazelle
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