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Bat Emergence Surveys
Emergence surveys are undertaken at dusk or dawn between May and September, they identify whether bats are present within a structure. This are usually undertaken in addition to an inspection survey, this is because some roosts can show no physical evidence of their presence during an inspection survey.
The structure to be surveyed is surrounded by surveyors such that all potential entrance/exit points are covered. The structure is then watched from either 15 minutes before sunset to 2 hours after or 2 hours before dawn to sunrise.
All emerging or re-entering bats are recorded along with their flight path, their species and the time of flight.
An emergence survey would identify:
All survey methodology follows that detailed in the Bat Conservation Trust's Bat Surveys: Good Practice Guidelines 2nd Edition.