Wildlife Survey Volunteer - Crayfish Control Volunteer

Main Activity

Work as part of a program to control numbers of the invasive signal crayfish on the River Barle upstream of Tarr steps.  This work is carried out under strict licence from the Environment Agency. 

You can volunteer on regular Tuesdays to check Artificial Refuge Traps (ART's) or take part in our week long baited trap sessions where we have to check the traps daily for a week.

All of the work is dependent on river levels.  They must be below 0.20m as recorded by the Environment Agency river gauge at Simonsbath.  You can view this here

You'll spend the morning walking a reach of the river checking crayfish traps with other volunteers.  The Crayfish you find will need tagging, marking, castrating, and in some cases humanely dispatching. (full training will be given).


Time Commitment 

at least 5 mornings over the survey period (April to October) Surveying takes place every Tuesday (river levels allowing) and during week long survey periods (dates below)

  • experienced crayfish volunteers can sign up as they can,
  • new volunteers to sign up for the regular Tuesdays or for an entire one week block.  This enables us to make sure new volunteers are are trained on their first day.

All the dates are river levels allowing and may need some moving about to allow for this.

On the regular Tuesdays we need at least 3 people meeting at 0930

On baited trapping weeks we need 3 trained volunteers each day, who may be joined by new volunteers to help.  (Plus another 3 on the Tuesday as usual)

Baited trapping weeks are due to take place in the last fortnight of June, July August and September)

If you are unable to make the minimum commitment of 5 days you can add your name to the backup list, If we then have spaces we'll let you know.

Skills needed

You will need to be able to

  • Walk on rough ground, climb up and down river banks
  • Be happy to handle live crayfish, and be happy to be close when trained people are humanly dispatching them (it is an offence to release them once caught).

We ask volunteers to sign up at least two weeks in advance so we can ensure we have adequate cover.  

What Now

If you are interested in undertaking this role you can fill out the application form or sign up for shifts or for an informal chat you can contact:- 

Patrick Watts-Mabbott

Volunteer and Outreach Officer

Exmoor National Park Authority

Exmoor House, Dulverton, Somerset TA22 9HL


Tel:  01398 323665 (switchboard)

Mobile:  07973727469


Qualifications Required

  • Crayfish handling Must be at least in training

Schedule Summary

The next 10 shifts (out of 61 total shifts) for this activity are as follows

Date Start Time End Time
Tuesday, April 10, 2018 9:30 AM 1:00 PM
Tuesday, April 17, 2018 9:30 AM 1:00 PM
Tuesday, April 24, 2018 9:30 AM 1:00 PM
Tuesday, May 01, 2018 9:30 AM 1:00 PM
Tuesday, May 08, 2018 9:30 AM 1:00 PM
Tuesday, May 15, 2018 9:30 AM 1:00 PM
Tuesday, May 22, 2018 9:30 AM 1:00 PM
Tuesday, May 29, 2018 9:30 AM 1:00 PM
Tuesday, June 05, 2018 9:30 AM 1:00 PM
Tuesday, June 12, 2018 9:30 AM 1:00 PM