Ecology, BNG and Protected Species – Page 4

25 September 2026Read article →

Conservation covenants for securing habitat for 30 years

A conservation covenant binds the land rather than the signatory and works across authority boundaries, which is why most commercial biodiversity gain sites use one.

25 September 2026Read article →

Off-site biodiversity gain and the statutory register

Units only count once the land is on the biodiversity gain sites register and the units are allocated to your development. A purchase agreement on its own is not enough.

Assessing ecology without access to adjoining land

A neighbour is not obliged to let your ecologist in. Desk records, boundary observation and precautionary assumptions can carry an application, provided the limitations are stated plainly rather than hidden.

Habitat creation: planting seasons and failure

Most habitat failures trace back to establishment: wrong season, wrong seedbed, no watering, or a mowing regime nobody told the contractor about.

Biodiversity metric errors councils find most often

Metric calculations rarely fail on arithmetic. They fail on habitat classification, unevidenced condition scores and retained habitat that the layout builds over.

Biosecurity method statements on development sites

Ecology conditions increasingly require a biosecurity method statement. What the amphibian disease and aquatic invasive risks are, and how to write a protocol a council will approve.

Reptile receptor sites: selection and capacity

A reptile translocation is only as good as its receptor. Here is how to assess capacity, prepare the habitat, secure the land and monitor what happens next.

Newt trapping, fencing and the spring window

Trapping and exclusion is the slowest route through a newt constraint. Here is what the fencing, the clear-day requirement and the receptor site mean for your programme.

Green roofs and the biodiversity units they deliver

Green roofs earn biodiversity units, but fewer than most schemes assume and only when specified as habitat rather than as a sedum mat. Here is what the metric actually rewards.

Registering a biodiversity gain site

Off-site units cannot be used until the land is registered and the units allocated to a named development. The sequence, the documents and the errors that cost weeks.

Lighting design that protects bats and invertebrates

Lighting a roost access point can amount to disturbance of a protected species whatever the ground-level lux. The evidence councils want is vertical illuminance at the habitat features.

How long an ecology survey stays valid for planning

Habitat data older than about two years and species data older than about 18 months will be queried. An update walkover by the original ecologist is usually the proportionate answer.

Wintering bird surveys and the October to March window

Wintering bird surveys run October to March and cannot be compressed. What they cover, how many winters are expected, and how disturbance is assessed.

Otters and holts in riverside development

Holts and couches are protected whether occupied or not, and otter cubs arrive in any month. What that means for survey timing, working distances and licensing.

Bats in trees: roost features and aerial inspection

Ground assessment, aerial inspection, suitability categories and licensing for bat roost features in trees, with the wording that separates no evidence from no bats.

Net gain on outline permissions and phased schemes

Phased schemes need an overall biodiversity gain plan plus a plan for each phase. How baselines hold across a long build out, how units are allocated and what happens when phases are sold.

Biodiversity net gain on a section 73 application

A section 73 permission is a new permission, so the biodiversity gain condition has to be considered again. Which variations are exempt, when the metric must be rerun and how to sequence the work.

Watercourse units and river condition assessment

The statutory metric treats watercourses as their own module, so area habitat units cannot cover a watercourse shortfall. What a river condition assessment involves and how to programme it.

Temporal risk and time to target condition in the metric

Created habitat is worth less in the metric the longer it takes to reach target condition. Understanding the temporal discount changes which habitats you create, when you create them and how much land the scheme needs.

A tree survey is not an ecology survey

Both documents talk about trees, and councils ask for both. One protects trees from construction, the other protects wildlife from you. Knowing which answers which question stops a scheme stalling at validation.

What makes a landscape and ecological management plan work

Landscape and ecological management plans are secured by condition and judged on whether anyone could enforce them. Measurable prescriptions, monitoring triggers and a named obligation holder are what separate a plan that works from one that is refused.

Scoping a preliminary ecological appraisal properly

A good appraisal names the habitats, the species surveys triggered and the window each one falls in. Here is how to scope and commission it so it protects the programme.

Breeding birds and vegetation clearance timing

Damaging an active nest is an offence for every wild bird species. Here is how the March to August constraint works in practice, and how to plan clearance around it.

Barn owls and development: survey and mitigation

Barn owls have no reliable closed season, so a barn conversion needs inspection before strip-out. Here is the protection, the survey evidence and the mitigation that works.