Soprano Pipistrelle
Pipistrellus pygmaeus
Tap image to enlarge · Wikimedia Commons
Overview
The Soprano Pipistrelle was only distinguished as a separate species from Common Pipistrelle in 1997 using echolocation frequency analysis. It prefers waterside habitats — which makes Marshside RSPB a likely spot. Physically almost identical to Common Pipistrelle, it echolocates at a higher frequency (55kHz versus 45kHz). A bat detector is needed for confident identification.
At a Glance
| Order | Chiroptera |
| Family | Vespertilionidae |
| Habitat | Reed bed edge · Waterway · Wetland edge · Woodland near water |
| Diet | Chironomid midges, small moths, aquatic insects |
| UK population | Around 1.3 million — separated from Common Pipistrelle as a distinct species in 1997 |
| Sefton Coast | Present in waterside habitats across the coast; likely at Marshside RSPB |
| Conservation | UK Green List |
Where to See It
Over water and wetland habitat. Marshside RSPB at dusk in summer.
Identification
Virtually identical to Common Pipistrelle in the field. Slightly pinkish face compared to Common's black face. Reliably distinguishable only by echolocation frequency (55kHz) with a detector.
Viewing & Photography Tips
Use a bat detector app at Marshside at dusk. 55kHz calls indicate Soprano; 45kHz indicates Common Pipistrelle. The waterside habitat preference is a useful clue.
Conservation Status
UK Green List
This species has a favourable conservation status in the UK and remains an important part of Sefton Coast biodiversity.
Frequently Asked Questions
How was the Soprano Pipistrelle discovered as a separate species?
In the 1990s, researchers noticed that some pipistrelle bats echolocated at 55kHz rather than the usual 45kHz. Genetic analysis confirmed these were a separate species. The Soprano Pipistrelle (Pipistrellus pygmaeus) was formally described in 1997. The two species can be found roosting in the same buildings but have different ecological preferences — Soprano preferring waterside habitats.
Related Species
Plan your visit to the Sefton Coast
Marshside RSPB, Formby pinewoods, Ainsdale NNR — practical guides to getting there, what to bring, and the best spots for each season.