Bat monitoring in Hartland - 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 - 13/09
Brandt’s Bat 17/04 - 24/06
Brown Long-eared Bat 04/02 - 14/09
Common Pipistrelle 04/01 - 14/09
Daubenton's Bat 16/04 - 14/09
Greater Horseshoe Bat 14/05 - 14/09
Grey Long-eared Bat 26/03 - 13/09
Leisler’s Bat 20/03 - 13/09
Lesser Horseshoe Bat 04/01 - 14/09
Myotis sp. 16/03 - 14/09
Nathusius's Pipistrelle 16/04 - 07/08
Natterer's Bat 09/02 - 13/09
Noctule Bat 09/02 - 14/09
Serotine 15/03 - 30/08
Soprano Pipistrelle 04/01 - 14/09
Whiskered Bat 01/04 - 13/09
Total number of recordings:
Soprano Pipistrelle 12759 (74%)
Noctule Bat 2416 (14%)
Common Pipistrelle 1106 (6%)
Serotine Bat 411 (2%)
Brown Long-eared Bat 245 (1%)
Leisler’s Bat 137
Lesser Horseshoe Bat 116
Natterer's Bat 38
"Myotis species" 31
Nathusius's Pipistrelle 21
Daubenton's Bat 18
Grey Long-eared Bat 16
Barbastelle Bat 7
Brandt’s Bat 4
Greater Horseshoe Bat 5
Whiskered Bat 2
Total of 17332 passes in 99 surveys with the last survey on 14/09/24
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:
7% 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.
