Bat monitoring - 2024
Summary:
Summary of emergence surveys (sunset - 30 minutes to sunset + 180 minutes) carried out at a fixed location survey point using Echo Meter Touch and manually analysing all calls:
Dates recorded:
Barbastelle Bat 16/04 - 03/10
Brandt’s Bat 17/04 - 07/08
Brown Long-eared Bat 04/02 - 03/10
Common Pipistrelle 04/01 - 03/10
Daubenton's Bat 16/04 - 14/09
Greater Horseshoe Bat 14/05 - 03/10
Grey Long-eared Bat 26/03 - 14/07
Leisler’s Bat 20/03 - 03/10
Lesser Horseshoe Bat 04/01 - 03/10
Myotis sp. 16/03 - 03/10
Nathusius's Pipistrelle 16/04 - 07/08
Natterer's Bat 09/02 - 03/10
Noctule Bat 09/02 - 03/10
Serotine 15/03 - 03/10
Soprano Pipistrelle 04/01 - 03/10
Whiskered Bat 01/04 - 19/09
Total number of recordings:
Soprano Pipistrelle 14365 (75%)
Noctule Bat 2304 (12%)
Common Pipistrelle 1565 (8%)
Serotine Bat 429 (2%)
Lesser Horseshoe Bat 134
Leisler’s Bat 127
"Myotis species" 96
Brown Long-eared Bat 65
Natterer's Bat 44
Nathusius's Pipistrelle 20
Barbastelle Bat 17
Daubenton's Bat 15
Greater Horseshoe Bat 8
Brandt’s Bat 6
Grey Long-eared Bat 5
Whiskered Bat 2
Total of 19202 passes in 104 surveys with the last survey on 03/10/24
Notes on each species:
Barbastelle Bat:
Occasionally recorded.
Brown Long-eared Bat:
Recorded between mid February and mid October in low numbers.
Common Pipistrelle:
10% of the Pipistrelles in my roost are this species; active all year with a peak in October.
Daubenton's Bat:
Feed over water courses; occasionally recorded between mid February to mid November.
Greater Horseshoe Bat:
Occasionally recorded each year between mid March and late September.
Grey Long-eared Bat:
Recorded mid February to early October in very low numbers; DNA analysis needed for confirmation.
Leisler’s Bat:
Recorded from mid February to mid October.
Lesser Horseshoe Bat:
Recorded year round in small numbers.
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.
