When Nature Supplies the Tool

A tool need not be manufactured. But the attached source could not be retrieved well enough to verify the examples it names, so read this as a cautious guide.

The sequence begins with shrikes and thorns, then elephants using their trunks. The source’s specific descriptions were unavailable for independent checking.

It then turns to seahorses and their grasping tails. That example is included here only as a reported point from the attached source, not as independently verified evidence.

The final example is trained cormorants using boats as working platforms. The source text supporting that description could not be retrieved.