Thursday, October 01, 2009

Rook Survey 2009

Many thanks to everyone who took part in the nesting rooks survey throughout Calderdale this year. The information was presented to the C B C G meeting last night.

1,913 nest were found in the Halifax Parish in 1964 from 37 sites (average 51.7 nests per site)

1,986 nest were found in 1975

864 nests were found from 50 colonies in 2009 throughout Calderdale (average 17.23 nests per colony)

If anyone would like a full report please let me know and I can email or post a copy on to you.
Well done everyone for providing all the information and especially to the Halifax Scientific Society who undertook the 1964 and 1975 surveys.
Dave
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2 comments:

Nick Carter said...

And to you Dave for co ordinating the counters, collating the data and writing the whole thing up. The survey is a significant contribution to local bird knowledge and of immense value for continuing to monitor future trends.

7:52 am
Jeff Cox said...

Absolutely right Nick. Well done Dave and if you need any grid refs checking just drop me an email and I'll get onto it for you.

10:30 am

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