Species Detail - Brown Hairstreak (Thecla betulae) - Species information displayed is based on the dataset "Butterflies of Ireland pre-2022".

Terrestrial Map - 10km

Distribution of the number of records recorded within each 10km grid square (ITM).
Live Map

Marine Map - 50km

Distribution of the number of records recorded within each 50km grid square (WGS84).
Live Map

Species image

Thecla betulae
Brown Hairstreak
NHMSYS0000504486 UnverifiedUnverified
N/A
thbet
(Linnaeus, 1758)
insect - butterfly
Species
240
19
6
17/08/1994
31/12/2021
1 January (recorded in 2021)
31 December (recorded in 2021)
National Biodiversity Data Centre, Butterflies of Ireland pre-2022, National Biodiversity Data Centre, Ireland, Brown Hairstreak (Thecla betulae), accessed 26 April 2025, <https://maps.biodiversityireland.ie/Dataset/378/Species/77372>

Records per month (across all datasets)

Records per year (across all datasets)