A couple of surveys to look out for in 2015

House Martin Survey 2015

There has never been a national House Martin survey before, previous population estimates have been derived using statistical methods from census data. In order to produce a population estimate as a baseline to measure future changes, there will be a survey in spring and summer 2015. There will be randomly selected squares to cover.

International Swan Census 17–18 January 2015

Using a similar approach to the Golden Plover Survey in the previous post, there will be an opportunity to contribute records of Whooper and Bewick's Swans through BirdTrack (www.birdtrack.net).

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