That’s an Aesop’s fable (the Crow and the Pitcher).

https://read.gov/aesop/012.html

Yes! And it also was an intentional study in animal cognition. Christopher Bird and Nathan Emery at the University of Cambridge decided to test whether birds could actually do what Aesop described. Their study, published in Current Biology in August 2009, was titled: "Rooks Use Stones to Raise the Water Level to Reach a Floating Worm."

https://www.sciencedirect.com/science/article/pii/S096098220...

There was a related study in 2014, "Using the Aesop's Fable Paradigm to Investigate Causal Understanding of Water Displacement by New Caledonian Crows."

https://journals.plos.org/plosone/article?id=10.1371%2Fjourn...