Disturbance can be classed as any activity that interrupts the natural behaviour of an animal.
Major Flight (MF) = extreme change in behaviour. Flight of more than 50m or agitated behaviour e.g. remaining airborne for more than 2 minutes or leaving area
Short Flight (SF) = Flight of less than 50m, returning to original behaviour within 2 minutes.
Walk/Swim (WS) = notable change in behaviour but not resulting in flight.
Alert (A) = alert and vocalising, but little change in movement
No Response (NR) = no apparent change in behaviour
The special interest features of the Exe Estuary SSSI include the wintering avocet, black-tailed godwit, brent goose, ringed plover and wigeon. In addition the breeding birds, dragonflies, saltmarsh, reedbeds, grazing marsh, muddy shores (including the seagrass beds) and Orcombe rocks are also special interest features.
BTO Bird species codes: