Andrew Harris & Roger Kiddie write:
After a trial year in 2012, we started two dry scrub Constant Effort Sites (CES) last year at the RSPB Northward Hill reserve. In 2012 we did the full 12 visits at one of the sites and seven visits at the other. The results from 2013 showed that adult survival was 37% down, but productivity was 23% up from 2012.
This year we speculated that with the mild
Thursday, July 3, 2014
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