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Black Hairstreak (Satyrium pruni)
© Nick Greatorex-Davies
In Britain the Black Hairstreak is a rare butterfly with a very restricted distribution. It is a sedentary and elusive butterfly of old Blackthorn (Prunus spinosa) scrub in woodland or on, or adjacent to, woodland edges. (For further details on this species see http://www.butterfly-conservation.org/).
Family: Lycaenidae
Status: Insufficient information
Status details:Insufficient information
Back to the topLog collated index plot
This chart shows the index of abundance (LCI = Log Collated Index) over time. It shows fluctuations in populations from year to year, and is scaled so that the average index over the whole series is equal to 2 (horizontal line). For greater detail about how this index is derived, click on the green question mark above.
Trend description:
Although this normally canopy dwelling butterfly is recorded occasionally on transects, the transect method is not suitable for monitoring changes in its abundance. The species is recorded on just four BMS transects and on none of these annually.
Distribution...
This map shows the distribution between 1995 and 1999. Data is derived from the Butterflies for the New Millenium dataset via the NBN Gateway (www.searchnbn.net).
View the distribution on the NBN GatewayPhenology...
Phenology plot
Phenology plot
This chart shows the average number of butterflies seen on transects between Arpil and October. The black line gives average counts over the full BMS series (1976 to date) and the red line gives the average for the last year.
Abundance...
Abundance
This map shows symbols for the mean abundance at transect sites, with the size of symbol reflecting the level of abundance. Means are over all years.
Coverage
This map shows the trend in abundance at particular transect sites. Trends (increasing, declining or stable) are assessed at sites where the species has more than five years of annual index data. Click on the green question mark next to the species name above for more details on how trends are calculated.
Links to lists of sites with particular statuses
- Stable sites (4)
