06/30/2025
Very interesting!
For years, scientists puzzled over how fish could appear in remote bodies of water with no streams or rivers connecting them. One answer came from research on bird digestion. Mallards, which often feed in fish-spawning areas, sometimes swallow fertilized fish eggs. In controlled studies, a small number of these eggs passed through the digestive tract unharmed and were later capable of hatching.
This process, called endozoochory, reveals that birds play a surprising role in spreading aquatic life. While rare, it’s enough to seed fish populations in isolated environments over time. It’s a reminder that ecosystems are deeply interconnected—even between the air and the water. 🦆🐟
