tag:blogger.com,1999:blog-6578048099798360228.post7695348264448658796..comments2023-10-08T12:58:54.017+01:00Comments on Birding Tring Reservoirs: CORN BUNTING numbers remain stableLee G R Evanshttp://www.blogger.com/profile/05193625627020046466noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-6578048099798360228.post-43858523009766234542011-12-11T15:23:41.663+00:002011-12-11T15:23:41.663+00:00It's interesting to relate the Marsworth Corn ...It's interesting to relate the Marsworth Corn Bunting and Reed Bunting roost counts back to events there in the 1980s. At that time CB roosts (estimated by counting birds as they came in) averaged about 120. Equally, most nights just a handful of RBs were seen. But then one winter we ran nets in the reedbed to colour ring the CBs. This was quite successful - though I don't have results to hand. It was likely that the roost size was comparable with the number of birds being seen from the bank. But the interesting point was that on each occasion 50+ RBs were also trapped. And the second week we did it there were no retraps from the first week, the third week very few etc. A bit of simple maths indicated a probable roost size of in excess of 1000 birds - the point being that unlike the CBs they come in at ground level mainly from the back of the reedbed and don't get counted.<br /><br />Paul ClarkPaul Clarkhttps://www.blogger.com/profile/01289707134631124475noreply@blogger.com