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Pale Clouded Yellow (Colias hyale)
© Eddie John
The Pale Clouded Yellow is a rare migrant to Britain and Ireland and is only recorded in some years. It is easily confused with the very similar pale form of the Clouded Yellow and with the Berger's Clouded Yellow. Caterpillars feed on various leguminous plants notably clovers (Trifolium) sp. and Lucerne (Medicago sativa). (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:
There have been a small number of records on BMS transects. Difficulties in separating this species from the pale form of the Clouded Yellow (Coleus croceus var. helice) and the Berger's Clouded Yellow make identification in the field extremely difficult and many identified as this species are likely to be the helice form of the Clouded Yellow.
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
Insufficient information
