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Wood White (Leptidea sinapis)
© Eddie John
In Britain, the Wood White is a declining and highly localised butterfly occurring in discrete colonies in tall grassland where vetches grow in sheltered situations such as woodland rides and glades. (For further details on this species see http://www.butterfly-conservation.org/).
Family: Pieridae
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:
The data show no significant trend in abundance. In recent years data have come primarily from Murlough in Northern Ireland and Whitecross Green Wood in Oxfordshire, where the populations remain fairly stable. At Whitecross Green Wood this is largely due to regular management carried out at the site which is tailored to provide good breeding conditions for this butterfly. At nearby Bernwood Forest, where there are three BMS transects, the butterfly appears to have declined to extinction. The Irish population at Murlough is probably the recently described Real's Wood White which is now thought to be the dominant species in most of Ireland.
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
In total, Wood White has been recorded from 184 transects in the Butterfly Monitoring Scheme. Of these, annual indices of abundance have been calculated from 62 sites, with an average index of 28 individuals per site.
For 38 of these sites, Wood White has been recorded well enough to calculate annual indices of abundance in 6 or more years, allowing trends to be calculated.
In 2006, 804 individuals were recorded from 21 sites, producing annual indices at 12 of these.
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
• Extinct sites (4)
• Colonised sites (1)
- Stable sites (13)
- Declining sites (6)
- Increasing sites (1)
