Bat monitoring in Hartland - 2024
Summary of emergence surveys only (sunset - 30 minutes to sunset + 180 minutes):
Dates recorded:
Barbastelle Bat 16/04 - 12/05
Brandt’s Bat 17/04 - 22/04
Brown Long-eared Bat 04/02 - 15/05
Common Pipistrelle 04/01 - 31/05
Daubenton's Bat 16/04 - 11/05
Greater Horseshoe Bat 14/05 - 15/05
Grey Long-eared Bat 26/03 - 31/05
Leisler’s Bat 20/03 - 06/05
Lesser Horseshoe Bat 04/01 - 15/05
Myotis sp. 16/03 - 15/05
Nathusius's Pipistrelle 16/04 - 27/05
Natterer's Bat 09/02 - 22/04
Noctule Bat 09/02 - 27/05
Serotine 15/03 - 31/05
Soprano Pipistrelle 04/01 - 31/05
Whiskered Bat 01/04 - 01/04
Total number of recordings:
Soprano Pipistrelle 5137
Noctule Bat 1972
Common Pipistrelle 414
Serotine Bat 116
Lesser Horseshoe Bat 102
Natterer's Bat 20
Brown Long-eared Bat 19
Nathusius's Pipistrelle 15
"Myotis species" 13
Leisler’s Bat 8
Daubenton's Bat 7
Grey Long-eared Bat 4
Brandt’s Bat 3
Greater Horseshoe Bat 3
Barbastelle Bat 2
Whiskered Bat 1
Total of 7836 passes in 65 surveys
Notes on each species:
Barbastelle Bat:
Very rarely recorded.
Brown Long-eared Bat:
Recorded between mid February and mid October in low numbers.
Common Pipistrelle:
27% of the Pipistrelles in my roost are this species; active all year with a peak in October.
Daubenton's Bat:
Hunt over water courses; occasionally recorded between mid February to mid November.
Greater Horseshoe Bat:
Very occasionally recorded each year between mid March and late September.
Grey Long-eared Bat:
Recorded mid February to early October in very low numbers.
Leisler’s Bat:
Recorded from mid February to mid October.
Lesser Horseshoe Bat:
Recorded between late August and mid April.
Nathusius's Pipistrelle:
Migratory species recorded between early March and late July although in milder years this can be up to early December.
Natterer's Bat:
Recorded year round; most active between late January and mid April.
Noctule Bat:
Active late March to mid September. Very high numbers recorded between late March and late May.
Serotine:
Active between mid March and mid August; peak numbers always seen in early July to mid August.
Soprano Pipistrelle:
Maturnity roost site; active year round and when pups are being reared can be seen during the day between May and July.
Whiskered Bat:
The most common Myotis species locally; recorded late March to late October.
Last survey 23/05/24
