Map help

Results from previous BTO Atlases - Help

Species page layout
Confidential species

Species page layout

Each page contains four maps: Breeding Atlas I map, Breeding Atlas II map, Change map of differences between both breeding atlases and Winter Atlas map. In addition, if both Breeding I and II are available, there is a link that allows you to compare on one page (side by side) the two Breeding Atlas maps.

There is also a table of change at the bottom of each page, detailing the percentage change in species coverage (number of squares recorded) between the two Breeding Atlases, for both Britain and Ireland.

Confidential Species

Certain species (below) were surveyed and their locations and breeding status considered confidential. Any species included in the atlas books that had grid squares moved or only 100km numbers displayed, have not been included. The confidentiallity of these species is currently being assessed on a species by species basis, and they will be included as and when a decision is made (currently 44 species: May 7, 2004).

Bittern	Golden Oriole	Marsh Warbler	Scaup
Black-throated Diver	Goldeneye	Montagu's Harrier	Serin
Black-necked Grebe	Goosander	Osprey	Short-toed Treecreeper
Black-tailed Godwit	Goshawk	Peregrine	Slavonian Grebe
Buzzard	Great Northern Diver	Red Kite	Snowy Owl
Chough	Hen Harrier	Red-necked Grebe	Spotted Crake
Common Tern	Hobby	Red-necked Phalarope	Stone Curlew
Dartford Warbler	Honey Buzzard	Red-throated Diver	Temminck's Stint
Dotterel	Hoopoe	Roseate Tern	Whimbrel
Fieldfare	Little Tern	Ruff	White-tailed Eagle
Golden Eagle	Marsh Harrier	Savi's Warbler	Wood Sandpiper


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