The meadow pipit (Anthus pratensis) is the default pipit. In the UK there are, besides meadow pipits, tree pipits, water pipits and rock pipits all very much alike.
The meadow pipit is by far the most common so if a bird watcher can’t tell which pipit he is looking at, he calls it a meadow pipit. Bird watchers are obviously too honourable to lay claim to a rare sighting without proof positive.
So, even though the pipit in the header picture was sitting in a tree with a small flock of other pipits when DKG photographed it, we have called it a meadow pipit because we do not have enough evidence to call it a tree pipit.
Here is a short recording of its song.
Conservation status: Classified in the UK as Amber under the Birds of Conservation Concern 4: the Red List for Birds (2015). Listed as Near Threatened on the global IUCN Red List of Threatened Species.