Company lists · Data refreshed September 2026

Top 25 Biodiversity conservation organizations based in the United Kingdom

Name: Biodiversity conservation organizations based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 157 companies tracked

RevenueBase identified 157 biodiversity conservation organizations headquartered in the United Kingdom as of September 2026 and tracks 6,211 professional contacts across them, including 2,506 with verified work emails. London is the largest hub.

This list covers biodiversity conservation organizations headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

157Companies

6,211Contacts tracked

2,506Verified emails

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The 25 largest biodiversity conservation organizations based in the United Kingdom

Ranked by team size

Top 25 of 157 biodiversity conservation organizations based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to biodiversity conservation organizations: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Zoological Society Of London ZSL	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	937 contacts →
	Partial evidence “As the original science-driven conservation organisation, we’re working to restore wildlife in the UK and around the world.” Source: RevenueBase Database · checked Sep 19, 2026
2	Fauna & Flora	Indirect evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	501-1,000	576 contacts →
	Indirect evidence “Fauna & Flora's work spans across the globe, with over 100 projects in more than 40 countries.” Source: RevenueBase Database · checked Sep 19, 2026
3	Birdlife International	Indirect evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	51-200	330 contacts →
	Indirect evidence “We’re BirdLife International, the only global Partnership conserving birds and all life on our planet.” Source: RevenueBase Database · checked Sep 19, 2026
4	Traffic	Indirect evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	51-200	169 contacts →
	Indirect evidence “TRAFFIC is a leading non-governmental organisation working globally to ensure that trade in wild species is legal and sustainable, for the benefit of the planet and people.” Source: RevenueBase Database · checked Sep 19, 2026
5	Lancashire Wildlife Trust	Partial evidence	Bamber Bridge, United KingdomHQ checked Sep 19, 2026	51-200	138 contacts →
	Partial evidence “We are part of the Wildlife Trusts movement, the UK's leading conservation charity dedicated to all wildlife.” Source: RevenueBase Database · checked Sep 19, 2026
6	Operation Wallacea	Indirect evidence	Lincolnshire, United KingdomHQ checked Sep 19, 2026	11-50	135 contacts →
	Indirect evidence “Operation Wallacea is a series of biological and social science expedition projects that operate in remote locations across the world.” Source: RevenueBase Database · checked Sep 19, 2026
7	Scottish Wildlife Trust	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	51-200	128 contacts →
	Indirect evidence “For 60 years, the Scottish Wildlife Trust has worked with its members, partners and supporters in pursuit of its vision of healthy, resilient ecosystems across Scotland’s land and…” Source: RevenueBase Database · checked Sep 19, 2026
8	Middlemarch	Indirect evidence	Coventry, United KingdomHQ checked Sep 19, 2026	51-200	118 contacts →
	Indirect evidence “With a legacy of over 30 years, we are a UK leading independent consultancy specialising in the preservation of the natural environment.” Source: RevenueBase Database · checked Sep 19, 2026
9	A Rocha International	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	107 contacts →
	Partial evidence “A Rocha is a global family of conservation organizations working together to live out God’s calling to care for creation and equip others to do likewise.” Source: RevenueBase Database · checked Sep 19, 2026
10	Born Free Foundation	Indirect evidence	Horsham, United KingdomHQ checked Sep 19, 2026	11-50	94 contacts →
	Indirect evidence “We work tirelessly to ensure that all wild animals, whether living in captivity or in the wild, are treated with compassion and respect.” Source: RevenueBase Database · checked Sep 19, 2026
11	Arcos Network Page	Strong evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	51-200	87 contacts →
	Strong evidence “The Albertine Rift Conservation Society (ARCOS Network) is a regional conservation organization with the mission to enhance biodiversity conservation and sustainable management of…” Source: RevenueBase Database · checked Sep 19, 2026
12	The Biodiversity Consultancy LTD	Partial evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	51-200	79 contacts →
	Partial evidence “The Biodiversity Consultancy exists to make positive biodiversity impact second nature for business.” Source: RevenueBase Database · checked Sep 19, 2026
13	World Land Trust	Partial evidence	Halesworth, United KingdomHQ checked Sep 19, 2026	11-50	53 contacts →
	Partial evidence “We’re WLT, an International Conservation Charity funding partner organisations around the world since 1989.” Source: RevenueBase Database · checked Sep 19, 2026
14	Wild Planet Trust	Partial evidence	Paignton, United KingdomHQ checked Sep 19, 2026	n/a	52 contacts →
	Partial evidence “Wild Planet Trust is a registered education, scientific, and conservation charity dedicated to protecting endangered species and plants.” Source: RevenueBase Database · checked Sep 19, 2026
15	Ecosulis	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	48 contacts →
	Partial evidence “Ecosulis specialises in biodiversity assessment, habitat creation, reintroducing and protecting species, and land management.” Source: RevenueBase Database · checked Sep 19, 2026
16	Synchronicity Earth	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	43 contacts →
	Partial evidence “Synchronicity Earth is a UK-registered conservation charity and trust-based philanthropic funder working to address overlooked and underfunded conservation challenges for globally…” Source: RevenueBase Database · checked Sep 19, 2026
17	Conservation Careers	Partial evidence	Oundle, United KingdomHQ checked Sep 19, 2026	n/a	37 contacts →
	Partial evidence “We believe that great conservation is done by great conservationists, and that wildlife deserves strong organizations employing the best staff to help protect it.” Source: RevenueBase Database · checked Sep 19, 2026
18	HCV Network	Indirect evidence	Oxford, United KingdomHQ checked Sep 19, 2026	11-50	36 contacts →
	Indirect evidence “Farms, forests and plantations provide people with food, ecosystem services and products like timber, paper and fuel.” Source: RevenueBase Database · checked Sep 19, 2026
19	Wilderness Foundation UK	Partial evidence	Chatham Green, United KingdomHQ checked Sep 19, 2026	11-50	35 contacts →
	Partial evidence “The Wilderness Foundation is a socio environmental charity founded in 1976 by the international conservationist Dr Ian Player DMS, renowned for saving the white rhino, and the…” Source: RevenueBase Database · checked Sep 19, 2026
20	People's Trust For Endangered Species	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	33 contacts →
	Partial evidence “PTES is a conservation charity, working to protect animals and their habitats in the UK as well as supporting conservation work overseas.” Source: RevenueBase Database · checked Sep 19, 2026
21	Mossy Earth	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect evidence “Mossy Earth partners with environmentally conscious businesses to restore nature across a wide range of ecosystems through rewilding initiatives.” Source: RevenueBase Database · checked Sep 19, 2026
22	Wildlife And Countryside Link	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “Wildlife and Countryside Link (Link) is the largest environment and wildlife coalition in England, bringing together 89 organisations to use their strong joint voice for the…” Source: RevenueBase Database · checked Sep 19, 2026
23	Conservation Optimism	Partial evidence	Oxford, United KingdomHQ checked Sep 19, 2026	1-10	19 contacts →
	Partial evidence “Conservation Optimism supports, empowers and enables conservationists around the globe, professional and amateur, by sharing hope and building capacity and community.” Source: RevenueBase Database · checked Sep 19, 2026
24	E3 Ecology	Indirect evidence	Hexham, United KingdomHQ checked Sep 19, 2026	11-50	19 contacts →
	Indirect evidence “E3 Ecology Ltd.” Source: RevenueBase Database · checked Sep 19, 2026
25	Integrated Biodiversity Assessment Tool Ibat	Partial evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	11-50	17 contacts →
	Partial evidence “At IBAT we provide commercial access to the world's most authoritative biodiversity data for reliable, web-based mapping, analysis, and reporting to help you assess risk…” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: biodiversity conservation organizations. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names biodiversity conservation organizations.
Partial evidence: Its own public description names part of biodiversity conservation organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name biodiversity conservation organizations. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 157 biodiversity conservation organizations based in the United Kingdom

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Biodiversity conservation organizations based in the United Kingdom at a glance

As of Sep 19, 2026

40.3%Verified-email coverage

39.6Average contacts per company

1-10Median size (employees)

27.4%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

101

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 157 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among biodiversity conservation organizations, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “biodiversity conservation organizations”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names biodiversity conservation organizations), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among biodiversity conservation organizations, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 2,506 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Biodiversity conservation organizations by metro

Biodiversity conservation organizations in London43

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names biodiversity conservation organizations, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many biodiversity conservation organizations are there based in the United Kingdom?

RevenueBase identified 157 biodiversity conservation organizations headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Zoological Society Of London ZSL, headquartered in London, tops this list with the largest team on record.

Which city has the most biodiversity conservation organizations?

London leads with 43 headquartered companies, followed by Cambridge (12) and Oxford (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,506 verified decision-maker contacts tracked across these 157 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.