Specialist field ecology.
From canopy to cave.
Ecoleg is a Cardiff-based ecological consultancy working across Wales and England.
Our chartered, licensed team brings specialist survey skills and technical access to projects of every kind.
From rail and infrastructure to habitat restoration and nature focused development.
Up to date: checked against current guidance on 10 November 2026
Survey season calendar for Wales and England
Survey windows, sensitive periods and works timing for bats, newts, dormice, birds, reptiles, badgers, otters, water voles, habitats and invasive plants. Many calendars online still use methods that have since been replaced. Ours is checked against the current NRW and Natural England guidance, dated, and sourced on every line.
Good for surveys in November
- Badger sett surveys
- Wintering bird surveys
- Dormouse nest tubes
- Dormouse nut searches
- Aquatic invertebrates
Take care in November
- Bats hibernating
- Newts hibernating on land
- Reptiles hibernating
- Dormice hibernating
Works windows open
- Badger sett closure
- Vegetation clearance (birds)
- Dormouse hand cutting
General guidance only. Timing depends on the site, the weather and what the planning authority needs.
What we bring
Bats, dormice, birds, botany and invertebrates, surveyed by experienced, licensed ecologists who know these groups inside out.
Specialist survey expertise
Our team is qualified in rope access, tree climbing and aerial rescue, and confined space entry, so we can survey bridges, cliffs, culverts and tree canopies directly.
Technical access
PTS qualified and SafeContractor accredited, with experience on live railways, construction sites and protected sites. Quotes within 24 hours and surveys planned around your programme.
Safe, quick and reliable
Get in touch
What we do
Ecological appraisal and impact assessment
Protected species surveys and licensing
Specialist access surveys
Ecological clerk of works and site supervision
Habitat restoration and management advice
Ornithology, botany and invertebrates
Recent work
We work with Natural Resources Wales and other public bodies, conservation and restoration projects, landowners and estates, rail, infrastructure and civils contractors, and ecological and engineering consultancies.
Natural Resources Wales
Aerial inspections and bird ringing to support woodland management and protected species monitoring.
Network Rail, South Wales Main Line 2
Ecological support for vegetation management across the route.
Hedgerow network research
Field research into hedgerow networks to inform sustainable farming operations.
Renewable energy developments
Ecological assessment for renewable energy schemes in Wales and England.
Merthyr Tydfil County Borough Council
Rope access survey of listed bridges ahead of safety works.
Transport for Wales, Core Valleys Line
Ecological support for up to 16 shifts a week.
“It is difficult finding qualified, professional ecologists, who are also reliable. Ecoleg is the exception and our first choice.”
Ryan Spence, RSS Infrastructure1. Tell us about the job
We'll send a quote by email within 24 hours.
3. Draft, then final
You'll see a draft report to comment on before we issue the final version.