Great crested newts (GCNs)

Desk-based assessments and on the ground surveys are used to identify ponds which have potential to be impacted by the scheme/works. Following this, and where access is available, ponds may be further assessed using Habitat Suitability Index (HSI) criteria in order to determine their suitability for the species.

Depending on the suitability of identified ponds, their proximity to the site, presence of barriers to dispersal and suitable on and off-site terrestrial habitat, further, more detailed surveys may be completed in order to confirm presence/likely absence of GCNs within ponds and estimate population sizes. Presence/likely absence may be determined using environmental DNA (eDNA) testing of pond water in a laboratory for GCN DNA. In accordance with best practice guidelines, this type of survey may only be completed between 15^th April and 30^th June in any given year and if presence is confirmed, more detailed population surveys may be required to support planning.

Presence/likely absence may also be determined through a range of survey techniques, such as bottle trapping, egg searching, torch surveys and/or netting. In order to comply with best practice, surveys must be completed during suitable weather conditions with at least three different survey methods used during each of four separate pond visits. At least two of these survey visits must be completed between Mid – April and Mid – May. If GCN presence is confirmed, a further two survey visits will be required to estimate population.

The Ecology Partnership has licensed GCN survey workers (Natural England licence) to allow individuals to undertake GCN surveys.

Where impacts cannot be avoided and a development licence is required for the scheme, for example due to the loss of a breeding pond or loss of suitable terrestrial habitat, then The Ecology Partnership can prepare the licence application on the client’s behalf. Either the standard Natural England European Protected Species (EPSL) approach to licencing may be taken or, depending on where the site is located, a District Level Licence (DLL) may be applied for. The Ecology Partnership can provide advice and guidance on the most suitable and appropriate licencing route to take.

The type and level of mitigation required for a scheme is dependent on a number of factors, such as the licencing route taken, as well as the nature and extent of the proposals, habitat suitability and proximity of ponds etc. Mitigation may involve installation of exclusion fencing and translocation using pitfall trapping, hand searches and destructive searches, alongside enhancements which may involve creation of artificial refugia/hibernacula, creation/enhancement of ponds and creation/strengthening of terrestrial habitat corridors.