Logic

A pipit in a tree must be a tree pipit just as a pipit in a meadow must be a meadow pipit. This logic suggests a meadow buttercup is also in the meadow and a creeping buttercup is on its hands and knees.

By the same token anyone seeing a butterfly on a tortoiseshell can be pretty sure it's a tortoiseshell butterfly.....?

The pipits do look almost identical, at least to those who don't have one in each hand and a guide book on the table. The 'parachute flight' of the tree pipit would be a pretty good desciption of what this fellow was going in for.