No Bats but a Bitt.

This week i have mostly been trying to get a bit of success with my new Bat Detector (Xmas Present).Had a couple of 45 Piperstrelles earlier in the week but no luck last night...Aah , except that in the gathering dusk a BITTERN flew over in a roughly N/E direction.I wonder if it's the recent Goodwick Moor bird or most probably a different one completely.