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Invertebrate survey


  • Terrestrial surveys: pitfall-trapping, moth surveys (light traps and sugaring), malaise trapping, active searches, beating and netting surveys, transect surveys, mark-recapture surveys, saproxylic species surveys.
  • Aquatic surveys: Biological Monitoring Working Party (BMWP) scoring and Predictive System for Multimetrics (PSYM), kick sampling, hand/refuge searches and netting, and inter-tidal species surveys.
  • Monitoring surveys



Impact assessment


  • Identification of potential direct and indirect impacts, both at the site level and in a wider perspective: risks of disturbing, injuring or killing protected invertebrates, habitat modification, loss, fragmentation or isolation, post development interference impacts and poor data situations or ‘last minute discoveries.
  • Quantification of potential impacts in terms of extent, magnitude, duration, timing, frequency, reversibility and cumulative effects.
  • Strategic advice on project feasibility




  • Precautionary working method statements
  • Tool box talks.
  • Services in an ecological clerk of works role.
  • Receptor site selection for terrestrial invertebrates.
  • Habitat design plans including the installation of ‘bug barns’, creation of breeding sites (e.g. log piles for stag beetles) and beneficial planting and landscaping schemes.
  • Capture and exclusion of terrestrial invertebrates using pitfall trapping, habitat searches and exclusion and drift fencing (e.g. roman snails).
  • Habitat management plans: to enable the practical conservation of invertebrate species associated with a particular habitat.