Gt. Black-backed Gull

Laris marinus

 

 

SP91 - Tring TL00 - Hemel Hempstead TL01 - Markyate TL10 - St Albans TL11 - Harpenden TL12 - S Hitchin TL20 - Hatfield and Potters Bar TL21 - Welwyn Garden City TL22 - Stevenage TL23 - Letchworth and Baldock TL30 - Cheshunt and Hoddesdon TL31 - Hertford and Ware TL32 - Buntingford and Puckeridge TL33 - Barkway TL41 - Sawbridgeworth and N Harlow TL42 - Bishop's Stortford TQ09 - Rickmansworth TQ19 - Watford and Borehamwood Major towns Important bird sites 10km Square IDs

First Winter Atlas

Day count

10km


1-10

10


11-59

3


60+

4


Total

17


New Winter Atlas

Status

Tetrads


Present

21


Not surveyed

215