Company lists · Data refreshed September 2026
Top 25 Bird conservation organizations worldwide
RevenueBase identified 600 bird conservation organizations worldwide as of September 2026 and tracks 10,426 professional contacts across them, including 3,875 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.
This list covers bird conservation organizations worldwide, 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. Country and city lists for bird conservation organizations follow the table.
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.
The 25 largest bird conservation organizations worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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, 2026Thanks. The Data Team will review it. | |||||
| 2 | 900 contacts → | ||||
Partial evidence “The National Audubon Society protects birds and the places they need, today and tomorrow, throughout the Americas using science, advocacy, education, and on-the-ground…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 3 | 585 contacts → | ||||
Partial evidence “As America's largest non-profit conservation organization, the National Wildlife Federation works closely with those who span the social and political spectrum, but who are…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 4 | 330 contacts → | ||||
Partial evidence “We’re BirdLife International, the only global Partnership conserving birds and all life on our planet.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 5 | 219 contacts → | ||||
Indirect evidence “At the Center for Biological Diversity, we believe that the welfare of human beings is deeply linked to nature, to the existence in our world of a vast diversity of wild animals…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 6 | 214 contacts → | ||||
Partial evidence “Australian Wildlife Conservancy (AWC) is a global leader in conservation, working across iconic Australian locations like the Kimberley, Central Australia, Cape York and Kati…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 7 | 207 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 8 | 202 contacts → | ||||
Indirect evidence “Defenders of Wildlife is dedicated to the protection of all native animals and plants in their natural communities.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 9 | 195 contacts → | ||||
Partial evidence “The British Trust for Ornithology (BTO) is the UK’s leading bird research organisation harnessing the skills and enthusiasm of over volunteers to monitor UK birds.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 10 | 169 contacts → | ||||
Indirect evidence “Bombay Natural History Society (BNHS) is an environmental NGO based out of Shahid Bhagat Singh Road, Mumbai, Maharashtra, India.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 11 | 162 contacts → | ||||
Indirect evidence “Vogelbescherming Nederland komt op voor in het wild levende vogels en hun leefgebieden.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 12 | 160 contacts → | ||||
Strong evidence “Point Blue Conservation Science (Point Blue) is dedicated to conserving birds, other wildlife, and ecosystems through innovative scientific research, restoration, outreach and…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 13 | 152 contacts → | ||||
Indirect evidence “Face to Face Fundraising” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 14 | 140 contacts → | ||||
Strong evidence “BirdLife Australia is Australia’s largest bird conservation organisation and is dedicated to stopping bird extinctions.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 15 | 120 contacts → | ||||
Partial evidence “American Bird Conservancy (ABC) takes bold action to conserve wild birds and their habitats throughout the Americas.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 16 | 116 contacts → | ||||
Partial evidence “NCF is a wildlife research and conservation non-profit that uses both science and sociology to understand and secure wild species and places in India.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 17 | 109 contacts → | ||||
Indirect evidence “SEO/BirdLife (Sociedad Española de Ornitología) está orientada a cumplir la función social que nos mueve desde 1954: estudiar y conservar las aves y la naturaleza y divulgar sus…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 18 | 104 contacts → | ||||
Strong evidence “Birds Canada is a national charitable organization dedicated to bird conservation.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 19 | 101 contacts → | ||||
Indirect evidence “The Swiss Ornithological Institute in Sempach is a non-profit foundation supported by the public.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 20 | 98 contacts → | ||||
Strong evidence “Parque das Aves is the only institution in the world focused on the conservation of the beautiful and exuberant birds of the Atlantic Rainforest, offering an up-close, immersive…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 21 | 91 contacts → | ||||
Indirect evidence “Sovon Vogelonderzoek Nederland organiseert landelijke vogeltellingen en voert onderzoek uit ten behoeve van beheer, beleid en wetenschap.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 22 | 88 contacts → | ||||
Partial evidence “The National Aviary is America’s only independent indoor nonprofit zoo dedicated exclusively to birds.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 23 | 88 contacts → | ||||
Indirect evidence “RAVON is al ruim 35 jaar de onafhankelijke natuurbeschermingsorganisatie zonder winstoogmerk die, tezamen met veel vrijwilligers, inheemse reptielen, amfibieën en vissen en hun…” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 24 | 71 contacts → | ||||
Strong evidence “Manomet is a science-driven conservation organization with deep roots in bird banding.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
| 25 | 71 contacts → | ||||
Indirect evidence “WWF's mission is to stop the degradation of our planet's natural environment, and build a future in which humans live in harmony with nature.” Source: RevenueBase Database · checked Sep 19, 2026Thanks. The Data Team will review it. | |||||
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: bird 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 bird conservation organizations.
- Partial evidence
- Its own public description names part of bird conservation organizations, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name bird 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 600 bird conservation organizations worldwide
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Bird conservation organizations worldwide at a glance
As of Sep 19, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 bird 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.
- Coverage
- Every country. Country and city lists for bird conservation organizations are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “bird 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 bird 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 bird conservation organizations, and records with no verified work email.
- 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, 3,875 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.
Bird conservation organizations by location
2 lists · largest firstEvery Bird conservation organizations list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 bird 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 bird conservation organizations are there worldwide?
RevenueBase identified 600 bird conservation organizations worldwide 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 country has the most bird conservation organizations?
The United States leads with 205 companies, followed by the United Kingdom (33). Every bird conservation organizations list by country and city is linked on this page.
Which city has the most bird conservation organizations?
Sao Paulo leads with 5 headquartered companies, followed by New York (4) and Quito (4).
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 3,875 verified decision-maker contacts tracked across these 600 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.