Eccleston Mere 18:30-19:45 the return of the American Black Tern

Amazingly the American Black Tern was back on the mere this evening after spending most of the day at Pennington Flash, 10 miles away to the east. It's incredible enough that a juvenile bird, perhaps no more than 3 months old, can make it across the Atlantic to find itself at Eccleston Mere, but even more amazing that after travelling east to Pennington Flash, where it meets up with a European Black Tern, which it spends most of the day with, it then decides to leave it's new companion and head 10 miles back to the mere. How did it find it's way back, why did it ignore all of the other waters in the area? There is a thesis in there somewhere.

This is its third day, and so far it's not been seen before 4pm. Perhaps there's a pattern developing and a clue as to when you should visit if you haven't seen it yet......