Ringlet (Aphantopus hyperantus)
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© Nick Greatorex-Davies
The Ringlet is a species of tall and often damp grassland in open but sheltered situations such as woodland edges, rides and glades, river banks, hedgerows and road verges. Coarse grasses seem to be preferred as larval foodplants. The species is expanding its range in Britain. (For further details on this species see http://www.butterfly-conservation.org/).
Status details :
Status since 1976 is Rapid increase with a increase of 299%
Status over the last 20 years is Rapid increase with a increase of 53%
Status over the last 10 years is Stable with a increase of 29%
Log 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 :
As a result of the 1976 drought numbers of Ringlet crashed but subsequently increased steadily over the next five years to well above 1976 level. The overall trend shows a highly significant increase coniciding with an expansion in distribution with the Ringlet becoming one of the most common species on many transects. Several northern UKBMS sites have been colonised during the monitoring period, indicating this spread.
This map shows the distribution between 1995 and 2016. Data is derived from the Butterflies for the New Millenium dataset via the NBN Gateway
This chart shows the average number of butterflies seen on transects between Arpil and October across all sites (fitted values from a Generalised Additive Model). The blue line gives average counts over the full BMS series (1976 to date) and the red line gives the average for the last year.
This map shows symbols for the mean abundance at transect sites, with the colour of the symbol reflecting the level of abundance. Means are over all years. Grey background squares are the occupied cells as shown by the Butterflies for the New Millenium over the previous ten year period.
In total, Ringlet has been recorded from 781 transects in the Butterfly Monitoring Scheme. Of these, annual indices of abundance have been calculated from 872 sites, with an average index of 108 individuals per site.
For 387 of these sites, Ringlet has been recorded well enough to calculate annual indices of abundance in more years, allowing trends to be calculated.
In 2019, 59897 individuals were recorded from 501 sites, producing annual indices at 407 of these.
Links to counts
This map shows the trend in abundance at particular transect sites for which data has been received within the last five years. Trends (increasing, declining or stable) are assessed at sites where the species has more than five years of annual index data. Use the option boxes below to view plots for individual sites.
Links to lists of sites with particular statuses
|Colonised sites (16)|
|Extinct sites (2)|
|Stable sites (459)|
|Increasing sites (268)|
|Declining sites (35)|