Ostriches swallow pebbles to grind their food
Ostriches swallow pebbles to grind food in their powerful gizzards, an essential adaptation for these toothless birds to digest tough vegetation and survive.
Ostriches, the world's largest birds, don't have teeth. Instead, they cleverly swallow small pebbles and stones, which travel to their gizzard – a powerful, muscular stomach pouch. These stones act like a natural mill, crushing tough foods such as grasses and seeds against the gizzard's walls. This process helps ostriches extract vital nutrients from their diet, especially fibrous plant material that would otherwise be difficult to digest. This adaptation is crucial for their survival in harsh African savannas, allowing them to thrive on a herbivorous diet. Many other birds, like chickens, also use this ancient digestive strategy.