Butterfly Conservation
saving butterflies, moths and our environment
Butterfly Conservation - saving butterflies, moths and our environment

Transect Resources

Transect Basics

A transect records butterfly numbers on a fixed route under standardised conditions at regular intervals over a set period of time. Transects reveal not only which species are present but also trends of abundance and phenology. They are essential to the work of Butterfly Conservation.

Weekly walk: fixed route in suitable weather, 1-4km, taking 45mins-2hrs.
Sections: A transect is seperated into sections and each section reflects the different habitat or management units of the site.
Width: 5m band (2.5m either side, 5m ahead) or 10m band (5m either side, 10m ahead)
26 Weeks: April 1 to September 29.
Time: 10.45am-3.45pm.
Weather: dry.
Wind speed: less than Beaufort scale 5. (Raises dust and loose paper; small branches moved)
Temperature: 13C if at least 60% sunshine, or more than 17C if overcast.

If it is too cold, or too windy or raining then transect should not be done.

General Resources

Sussex Resources

Adur Group

Mill Hill

Anchor Bottom

Lancing Ring

Bevendean Group

Rowland Wood Group

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