I heard Bitterns were back at Slimbridge (Dec 2011) so I made a trip
to see them. There were two but it was only on the third visit
that I got some close shots right in front of the hide. It can
be a long job waiting for them but they are spectacular when you
finally see them.
I visited Shapwick / Ham Wall reserves in Somerset during July 2010
and hoped I might see a Bittern. I had only been there about
15 minutes when one rose from the reeds and flew over our heads.
The warden at Ham Wall had left posters around the reserve asking
for details if anyone had seen Bitterns so I sent him these (grainy)
photos and a map of where it was found. He confirmed it was a
female most likely flying out from a nest to find food as it was
calling. It is a female because there is
no blue marking at
the top of the bill.