The phrase "huge herds" refers to large groups of animals, especially mammals like cows, horses, or elephants, that move or live together. Full definition
The water level of the lake provides rich grasses for huge herds of buffalo and elephant as well as rhino, hippo and crocodiles and a great variety of antelope and plains game. (vjv.com)
Beginning around 1000 B.C., a wetter climate may have created grassy steppes that could support huge herds of horses, sheep, and goats. (discovermagazine.com)
What could be more inevitable than the vision of the bush bulldozed into agricultural production, of the grassy plains carrying huge herds of the familiar domesticated animals? (scientificamerican.com)