I was lucky enough to watch several families of swallows teach their young ones how to drink from a swimming pool – it was alarming, stressful, and amazing!
The adults line up so they have the longest length of the swimming pool in front of them, then they skim along the surface and dip their bills in; they leave a sharp ‘V’ shaped wake.
The little ones? No. They make splashes, big sprays of water, and choppy drops into the pool. It was so alarming to watch that I propped the door open and had the pool net leaning against the wall. Happily, it was never needed.
After 20 minutes or so, the little ones were no longer making the big splashy crashes, and looked well on their way to mastering the fly & drink.
Here are a few pics from the web (not my pics) –