Corylus Ecology provide a complete ecology service, from fieldwork and habitat surveys to impact assessment and project design.


All of Corylus's ecologists are competent in Phase 1 Habitat Survey (including Extended Phase I Habitat Survey). We have experience in the design of botanical mitigation and trans-location schemes, and the preparation of habitat management plans.


We provide clients with high quality survey results, along with evaluation, interpretation and practical advice.


Site surveys explained


"The requirements of planning can be a daunting process so having an expert on hand was invaluable"

Phase I surveys

Phase II surveys

This is a standardised survey which classifies habitats within a site by identifying the plants and communities present. The habitats are mapped to produce a colour coded plan with target notes to summarise key features and lists of plant species. A Phase I Habitat survey is often the first time ecologists are present on site and is a key assessment for most planning applications.  At Corylus Ecology our ecologists are widely experienced in botanical identification and undertake highly detailed assessments providing the client with a professional report that is the basis for an Ecological Impact Assessment as well as mitigation, compensation and enhancement schemes.


Corylus Ecology often ‘extend’ this initial survey to include an assessment of key habitats with potential to support protected species such as reptiles, great crested newts, badgers, breeding birds, dormice and bats.  In certain sites this assessment will also focus on the potential for water vole, otter and white-clawed crayfish.  Included in this extended Phase I habitat survey would be an assessment of trees for their potential to support bats as well as an assessment of ponds for the potential to support great crested newts – an assessment referred to as a Habitat Suitability Indices or HSI assessment (link to GCN survey page).


The survey will also look for evidence of badger such as setts, latrines, and feeding or snuffle holes.  The result of this assessment is a detailed ecological report that will recommend further surveys where required and can suggest recommendations for project design and enhancements.

Botanical Surveys

This is a more detailed botanical assessment of habitats usually undertaken following the National Vegetation Classification (NVC) methodology. Quadrats are used of differing sizes, depending on habitat type, to compile lists of flora and an estimation of the cover of each species within each quadrat is made. Following the prescribed methodology enables the site to be compared against the NVC datasets and assigned to a described community.


When surveying hedgerows as part of a Phase 1 Habitat Survey, these are typically defined as species rich, species poor or defunct and with trees absent or present. A more detailed survey may sometimes be required to determine whether hedgerows may be “important” under the Hedgerows Regulations 1997.


Hedgerow Surveys

This is a more detailed survey following a prescribed methodology. It considers the species composition within the hedgerow by finding an average number of species calculated within the central 30m from each 100m section, as well as assessing other features such as connectivity to other hedgerows, ponds and woodlands, the amount of gaps, the presence of woodland indicator ground flora and the presence of other features such as ditches, walls and banks and footpaths. Taken together these characteristics indicate whether a hedgerow may be important under the Regulations.



we can help
your project

All of our ecologists are IEEM registered with a wealth of experience, delivering high standards of work and customer service at competitive prices. Get in touch today to discuss your specific requirements and receive a quote.



Corylus Ecology Ltd

Unit A3 Speldhurst Business Park

Langton Road


Tunbridge Wells



T 01892 861868


12 Great Bridge Cottages

Headborough Road



TQ13 7QW

T 01364 653300

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