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Bird Atlas Key Statistics

Headlines - 112.3 million birds of 522 species
(inc escapees and races)
Based on 116337 TTVs, 2072035 Roving Records, and 2268425 BirdTrack records from 12982 online users

Most widespread species on TTVs

This is based on the number of TTVs on which the species was counted.

Season 1st 2nd 3rd
Winter
4th: Blue Tit , 5th: Wren
Breeding
4th: Woodpigeon , 5th: Robin

Roving Records - thousands of records
The table below summarises the incredible number of Roving Records submitted by observers in each season, and the graph shows the number of Roving Records per survey month since fieldwork began in November 2007.

Season Number of
records
Number of
species
Number of
10-km squares
Winter 1111792 405 3725
Breeding 960243 430 3779

Timed Tetrad Visits - amazing uptake
The table below summarises how many tetrads have been requested by observers in each season.

Season Number of
tetrads signed-up
Progress towards
minimum requirement
Click below
for map...
 
Winter
 
43851
 
Click for maps
 
Breeding
 
42428

Timed Tetrad Visits - excellent coverage
The table below summarises how many tetrads have been surveyed by observers in each season.

Season Number of
tetrads visited
Surveyed twice Progress towards
minimum coverage
Click below
for map...
Winter (all years) 37694 28357  
Click for maps
  2007/08 16497 14904
  2008/09 11974 9856
  2009/10 9223 3597
Breeding (all years) 27164 23122
  2008 15190 13361
  2009 11974 9761
  2010 0 0

Combined results - Atlas and BirdTrack
The results below bring together Roving Records, Timed Tetrad Visits and information from BirdTrack.

What % of the species have we found in each 10-km square?

For a map click here
Select a region to see more detailed results
(Versions for slow connections here)
 
To view example species maps and results, click on the images below:
Wren Meadow Pipit Sedge Warbler Willow Warbler Little Owl Barn Owl
Click to view: Wren Click to view: Meadow Pipit Click to view: Sedge Warbler Click to view: Willow Warbler Click to view: Little Owl Click to view: Barn Owl
Red Grouse Skylark House Sparrow Tawny Owl Blackbird Oystercatcher
Click to view: Red Grouse Click to view: Skylark Click to view: House Sparrow Click to view: Tawny Owl Click to view: Blackbird Click to view: Oystercatcher
Maps are provisional, unvalidated and do not include paper records. They are indicative of coverage only.

Validation - turning records to data
The table below summarises the number of records received by season and shows progress on validation. Validation is crucial to ensure the records we use are correct and free from typos or errors.

Season Unchecked Valid ID
query
Breeding code
query
Count
query
Location
query
% valid % queried
Winter (all years) 1652321 3079985 936 201 649 1457 65.04 0.068
Breeding (all years) 1564004 2624762 758 2311 261 1594 62.588 0.117
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