A new dedicated page for data, analysis, facts, figures, and statistics all about Herts Birds!

More to come.

2021 species totals

A graph showing the number of species recorded in each month of 2021 - totals taken from all available sources including website submissions, eBird and Birdtrack



2021 First and last migrant dates

A table showing the first and last dates for summer visitors in Hertfordshire in 2021
Little Ringed Plover 9th Mar Panshanger Park 19th Aug Tringford Res
Common Tern 29th Mar Startops Res 3rd Sep Tyttenhanger GP
Cuckoo 22nd Mar Sandon 1st Sep Essendon
Swift 13th Apr Redbournbury 16th Sep Baldock
Hobby 27th Mar Stevenage 5th Oct Amwell GP
Sand Martin 8th Mar various 4th Oct Amwell GP
Swallow 26th Mar various 23rd Oct Rye Meads
House Martin 21st Mar Baldock 11th Oct Sawbridgeworth
Willow Warbler 12th Mar Moor Park 29th Sep Fairlands Valley
Sedge Warbler 30th Mar Amwell GP 25th Sep Stanborough GP
Reed Warbler 2nd Apr Amwell GP 25th Sep Rye Meads
Grasshopper Warbler 18th Apr various 8th Sep Sawbridgeworth
Garden Warbler 2nd Apr Batchworth Lake 19th Sep Stocker's Lake
Lesser Whitethroat 10th Apr Hemel  28th Sep Amwell GP
Whitethroat 31st Mar Wilstone Res 3rd Oct Baldock
Ring Ouzel 31st Mar Essendon N/A  no records
Spotted Flycatcher 7th May Tyttenhanger GP 20th Sep Stanborough GP
Wheatear 24th Mar Symonshyde  1st Oct Tyttenhanger GP
Yellow Wagtail 31st Mar Ashwell 29th Sep Ivel Springs NR