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Transect Results 2017 

Transect Results 2017 

Transect Results 2017

57 Transects were walked in 2017 in the West Midland area, almost 87,000 butterflies were recorded. There were 1144 visits made to sites to obtain these results which means over 2000 volunteer hours. 31 Transects have been walked consistently for 5 years which means that these data can be used to estimate population trends. After the 2016 disaster year for butterflies 2017 showed a great recovery. The overall count 46% higher that last year.
Overall the commonest butterflies were Meadow Brown, Ringlet, Gatekeeper and Speckled Wood. These 4 species constituted over 50% of all butterflies recorded. The scarcer butterflies constitute under 1.5% of the total records. Overall 42 species were recorded.   

Common Species

Percentage of total

Scarce Species

Percentage of total

Scarce Species : Although these species are monitored using Transects they are often better counted using Time Counts and GPS searches. Brown Hairstreak is monitored using egg counts only. Only casual records were received for Large Heath in 2017.
Painted Lady, Clouded Yellow and Red Admiral as migratory species varies widely from year to year. Red Admiral showed extremely high returns throughout the branch.
The distribution of species for 2017 is shown on chart 1 and 5 year distribution is shown on chart 2.

Below charts showing Population Trends for species that show significant trends over the last 5 years. Other species can be classed as stable.  The second line on the chart shows the number of sites where the species have been recorded in the last 5 years (Maximum 31)