The first Sand Martin of 2023 was seen on 11-Mar just one day out from its average arrival date in Herts.
Back for its second year, track the first dates of 20 more of our most common spring arrivals using the excellent Herts Spring Migrant Tracker developed by Chris Ruis.
Latest arrivals:
Hobby, 17-Apr, High Wych nr Sawbridgeworth
Cuckoo, 15-Apr, Essendon
Lesser Whitethroat, 10-Apr, Stanborough GPs


