What Calidris does

Calidris is a French environmental consulting bureau (bureau d'études) founded in 2007, specializing in ecology, natural environments, and biodiversity. The firm delivers regulatory environmental impact assessments, Natura 2000 incidence studies, protected species derogation dossiers, and ongoing population monitoring for project developers, local authorities, and natural space managers. Its core technical offering centers on proprietary mathematical collision risk models applied to renewable energy projects (particularly wind), enabling quantification of mortality risk and curtailment gain to determine regulatory compatibility, complemented by a large fleet of active and passive recording equipment for bat (chiroptère) studies and GWO-certified work at height on wind turbines and measurement masts.

The firm's expertise spans avifauna, chiroptères, mammals, reptiles, insects, amphibians, flora, natural habitats, and wetland zones, alongside a DUE Diligence service line that reviews environmental studies against IFC, EBRD, and World Bank lender standards. Calidris operates through six regional agencies across metropolitan France (Ouest, Est, Sud, Sud-Ouest, Nord) and one international office in Kyiv, Ukraine, with confirmed project delivery in 17+ countries across Europe, Africa, the Middle East/Central Asia, and East Asia. Services are billed on a project-by-project basis with custom quotations.

Calidris generates revenue through professional services for ecological expertise, with go-to-market driven by direct client outreach ([email protected]), a bilingual website (calidris.fr / calidris-ua.com), LinkedIn presence, and word-of-mouth within the French and international renewable energy, infrastructure, and public-sector ecosystems. The firm is privately held with no disclosed funding rounds, parent company, or external investors, and operates as a self-funded specialty consultancy with 11-50 employees.

Name

Calidris

Legal name

CALIDRIS

Website

https://calidris.fr

Company type

Private

Founded year

2007

Operating status

Operating

Headcount range

11–50 employees

Short description

Calidris is a French environmental consulting firm (founded 2007) that delivers ecological impact studies, collision risk modeling for renewable energy projects, and biodiversity monitoring for developers, local authorities, and natural space managers across France and 17+ countries.

Ownership category

akta.pro rank

Product category

Environmental Consulting Services

NAICS

Environmental Consulting Services (541620), Environmental Consulting Services (54162)

akta.pro primary industry

Biodiversity Baseline Studies & Long-Term Monitoring Programs (EUAHAHAE)

akta.pro secondary industries

Environmental & Social Management Plans (ESMP) / Mitigation Monitoring (EUAHAAAG), Environmental Data Integration, ETL & Interoperability (APIs, Standards, Data Pipelines) (EUAHAKAB)

Keywords

• Environmental consulting services
• Biodiversity impact assessment
• Collision risk modeling
• Renewable energy permitting
• Ecological field studies

Headquarters

HQ city

La Montagne

HQ country

France

HQ region

Europe

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Environmental Consulting and Study Services: Calidris generates revenue through professional services providing ecological expertise for construction and development projects. Services include regulatory studies, management plans, population monitoring, environmental diagnostics, and DUE diligence reviews, billed on a project-by-project basis. The firm operates in France and internationally serving project developers, local authorities, and natural space managers.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Calidris is an environmental consulting bureau that provides ecological studies, regulatory environmental impact assessments, biodiversity field surveys, and collision risk modeling for renewable energy and infrastructure projects. Services span avifaune, chiroptères, mammals, reptiles, insects, amphibians, flora, and wetland studies, complemented by Natura 2000 incidence studies, ESIA, protected species derogation dossiers, DUE diligence reviews, and construction/ICPE monitoring for project developers, local authorities, and natural space managers across France and internationally.

Product overview

Calidris is an environmental expertise bureau (bureau d'études) specializing in ecology, natural environments, and biodiversity. The company offers a comprehensive suite of environmental assessment services organized around fauna studies (Avifaune, Chiroptères, Mammals, Reptiles, Insects, Amphibians) and flora/habitat studies (Flora & Natural Habitat, Wetland Zones), complemented by regulatory documentation services (Environmental Impact Studies, Natura 2000, ESIA, Protected Species Derogations). The core offering includes proprietary Mathematical Risk Models for collision risk assessment in renewable energy projects. Services are delivered through a network of five regional agencies across France (Ouest, Est, Sud, Sud-Ouest, Nord) plus an international office in Kyiv, Ukraine. The company also provides DUE Diligence services, Perilous Environment Expertise, Construction Monitoring, and Training & Conference offerings.

Differentiator

Problem solved

Functional benefit

Brands

• Fonds SET (Solidarité, Environnement et Territoire): A fund initiated by Calidris in 2021 serving the general interest to contribute to changing the world through biodiversity, solidarity, and ecological transition projects.

Products and services

• Environmental Impact Studies (Études d'impact) Regulatory environmental impact assessments and Natura 2000 incidence studies for development projects including wind, solar, urban planning, roads, and quarries. Delivered for project developers, local authorities, and natural space managers in France and internationally.
• Avifaune Studies and Collision Risk Modeling Terrestrial and offshore bird population studies covering nesting (IPA, STOC EPS, Transects, Quadras), migratory counts (static counts), and wintering population assessments (transects). Includes bespoke collision risk modeling for wind energy projects when specific species such as Red Kite or Black Stork are at stake, with fine-grained barrier-effect quantification for birds and bats.
• Chiroptères (Bat) Studies Studies of bat species composition and territory occupancy across the ecological cycle using an extensive fleet of active and passive recorders exceeding standard sampling protocols. Includes activity protocols based on distance from woodland edges, curtailment collision-risk gain calculations, and GWO-certified custom recorder installations on measurement masts and wind turbines for full-season autonomous monitoring.
• Other Fauna Studies (Mammals, Reptiles, Insects, Amphibians) Multi-taxon fauna studies covering mammals (track identification, indirect indices, camera traps, nocturnal observation), reptiles (non-invasive inventories using artificial solar heating plates), insects (butterflies, dragonflies, orthopterans, saproxylophagous beetles with standard methodologies and cartography), and amphibians (adult observation, spawn monitoring, larval tracking during spring reproduction, plus terrestrial habitat and refuge searches).
• Flora, Natural Habitat, and Wetland Studies Detailed mapping of conservation-priority and regulatory plant species and associated habitats. Wetland identification following the 3.3.1.0 nomenclature of the arrêté du 24 juin 2008 and functionality analysis using the national wetland methodology in application of the Loi sur l'eau.
• Perilous Environment Expertise Environmental studies delivered in challenging natural environments including forests, deserts, and savannas, and under difficult political conditions (e.g., Niger, Ukraine). Teams work in safety under all conditions and have experience operating when political conditions are challenging.
• DUE Diligence Services Quality analysis of environmental studies for projects being acquired or financed, confronting methodologies, collected data, and analyses against international lender standards, bibliography, and state of the art.
• Mathematical Risk Models Proprietary mathematical models applied to renewable energy projects to objectify mortality risks specific to each project, including evaluation of collision risk for species such as Red Kite and Black Stork, and definition of risk reduction gains from curtailment measures to determine residual collision risk compatibility with regulations and species biology.
• ESIA Studies (Environmental and Social Impact Assessment) Environmental and Social Impact Assessments for international projects following IFC, EBRD, and World Bank standards.
• Protected Species Derogation Dossiers Regulatory dossiers for derogations related to protected species in development projects, supporting legal security and regulatory compliance for project developers.
• Construction & ICPE Monitoring Construction site monitoring and follow-up of classified installations for environmental protection, including mortality tracking and activity monitoring at ICPE-regulated sites.

Quantifiable outcome

• Mathematical models objectify collision risk per project, enabling quantification of residual risk and determination of regulatory compatibility for wind energy projects.
• +1 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Fonds SET (Solidarité, Environnement et Territoire)minorOthers · 1 January 2021Calidris initiated the creation of the Fonds SET in 2021, an outil au service de l'intérêt général (tool serving the general interest) contributing to changing the world. The fund finances and carries projects around three axes aligned with Calidris's core values: biodiversity, solidarity, and ecological transition. While not a commercial partnership, this represents a founding initiative by Calidris rather than a partnership with an external entity.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Arcadis: Dutch-headquartered global design and consultancy firm with a sizable environment and resilience practice covering ecology, EIA, and ESG advisory for renewable and infrastructure clients. Comparable to Calidris as a global incumbent with multi-country delivery capability and broader service lines.
• SLR Consulting: Global environmental and advisory consultancy with strong renewable energy and ecology practices delivering EIA, ornithology, and bat studies for wind developers. Comparable to Calidris as a global mid-to-large incumbent competing on international wind and solar EIA mandates.
• Environmental Resources Management (ERM): World's largest pure-play sustainability and environmental consultancy, with deep ecology, EIA, and biodiversity practices serving renewables, infrastructure, and oil & gas clients globally. Comparable to Calidris as a global incumbent with IFC/World Bank compliance capability and far greater delivery capacity.
• WSP Environment & Sustainability: Global professional services firm with a large environment and sustainability practice delivering EIA, ecology, and climate advisory for renewables and infrastructure. Comparable to Calidris as a global incumbent competing on large international ESIAs and IFC-compliant mandates.
• AECOM Environment: Global infrastructure consulting firm with a large environment practice delivering ecological assessments, permitting, and biodiversity services for renewables and infrastructure. Comparable to Calidris as a large global incumbent competing on international lender-financed mandates.
• Ramboll Environment & Health: Nordic-headquartered global consultancy with significant environment, ecology, and renewable energy advisory practices. Comparable to Calidris as a global incumbent with strong Northern European presence and overlap on wind EIA, offshore ecology, and IFC-standard project work.
• Artelia: Large French engineering consultancy with a substantial environment and urban planning division delivering EIA, biodiversity, and water law studies. Comparable as a domestic broad incumbent that competes with Calidris on French infrastructure and renewable permitting work, while also offering broader multi-disciplinary engineering capabilities.
• Egis Group: Major French engineering and consulting group operating across infrastructure, energy, and environment — now includes Biotope following its 2024 acquisition. Comparable to Calidris as a broader incumbent offering bundled environmental, engineering, and project finance advisory that competes for the same French and international renewable mandates, with much greater scale.

Direct peers

• Biotope: French environmental consultancy headquartered in Mèze, founded in 1993, specializing in biodiversity studies, ecological engineering, and natural area management. Direct competitor with overlapping fauna/flora expertise and renewable energy project focus; Calidris and Biotope routinely bid against each other in French wind EIA work. Biotope was acquired by Egis in 2024, increasing its scale.
• Natural Power Consultants: UK-headquartered independent consultancy focused on renewable energy project development, with a large ecology and ornithology practice delivering collision risk modeling, bat surveys, and EIA for wind farms. Highly comparable to Calidris in core wildlife-wind offering, with overlapping IFC-standard delivery and pan-European project reach.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/calidris-expertises-environnementales

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Calidris