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When is the best time to conduct an ecology survey for development projects?

Many species of plants and animals in England and often their supporting habitats are protected. What you can and cannot do by law varies from species to species.


It is essential that you have the necessary reports to inform and support your application if you are considering applying for development in the upcoming months, whether it be a loft conversion or the construction of multiple properties.


For further information, please get in contact with us today. We'll make sure your project is managed correctly from start to finish and that the right consultants are hired to minimise delays.



Where to expect protected species?

Habitat, building or land



Species to look for

Ancient or veteran trees or those with significant decay features

Bats, breeding birds, dormice

Cellars, ice houses, old mines and caves

Bats

Buildings with features suitable for bats, or large gardens in suburban and rural areas

Bats, breeding birds, badgers, reptiles and great crested newts

Traditional timber-framed building (such as a barn or oast house)

Bats, breeding birds including barn owls

Lakes, rivers and streams (on the land or nearby)

Breeding birds, fish, otters, water voles and white-clawed crayfish

Heathland on, nearby or linked to the site (by similar habitat)

Breeding birds, badgers, dormice, reptiles, invertebrates, natterjack toads and protected plants

Meadows, grassland, parkland and pasture on the land or linked to the site (by similar habitat)

Bats, badgers, breeding birds, great crested newts, invertebrates, reptiles and protected plants

Ponds or slow-flowing water bodies (like ditches) on the site, or within 500m and linked by semi-natural habitat such as parks or heaths

Breeding birds, fish, great crested newts, water voles, invertebrates and white-clawed crayfish

Rough grassland and previously developed land (brownfield sites), on or next to the site

Breeding bird, reptiles, invertebrate and protected plants

Woodland, scrub and hedgerows on, or next to the site

Bats, breeding birds, badgers, dormice, invertebrates, great crested newts, reptiles and protected plants

Coastal habitats

Breeding birds, fish, natterjack toads, otters and invertebrates

When to survey

Species



When to survey

(dependent on weather conditions)

Badgers

Any time of year. February to April or October to November for bait marking surveys to establish territories

Bats (preliminary roost assessment)

Any time of year (trees are best surveyed without foliage)

Bats (hibernation roosts)

November to mid-March

Bats (summer roosts)

May to August

Bats (foraging or commuting)

April to October for spring, summer and autumn behaviour

Bats (swarming)

August to October

Birds (breeding)

March to August (species dependent)

Birds (winter behaviour)

October to March

Birds (migration)

March to May, August to November (dependent on species)

Dormice

April to November

Great crested newts

Mid-March to mid-June (Mid-April to end of June for eDNA)

Invertebrates

April to September

Natterjack toads

April to May (aquatic survey)


July to September (terrestrial survey)

Otters

Any time of year

Reptiles

April to mid-October

Water voles

Mid-April to September

White-clawed crayfish

July to September


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