Gadwall - 1980s BTO winter atlas

Sunday, September 18, 2011 at 4:01PM
Pembrokeshire Avifauna committee in BTO, GHR, Gadwall, atlas, duck, wildfowl, winter

 

 

The BTO winter atlas showed that Gadwalls were present in both estuarine and fresh water 10km squares during the winters of 1981-82, 1982-82 and 1983-84.

 

The darker the colour, the higher the relative total count for each 10km square, the darkest blue represents over 23 birds.

 

Graham Rees 

 

 

 

 

 

Article originally appeared on Birds in Pembrokeshire (http://pembsbirds.squarespace.com/).