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Make your donationAbout Maine Natural History Observatory
Maine Natural History Observatory (MNHO) is a nonprofit research organization in Downeast Maine dedicated to documenting, studying, and sharing knowledge about Maine’s plants, animals, and ecosystems. Through scientific research, long-term monitoring, and data archiving, MNHO is working to build a comprehensive understanding of the state’s biodiversity and natural history. The Observatory collaborates with conservation organizations, volunteers, and agencies to collect high-quality biological data, develop natural history educational tools, and make natural history information accessible to scientists, educators, and the public. Its mission is to advance the conservation of Maine’s natural resources by providing reliable data and fostering a deeper appreciation for the state’s rich ecological diversity.
Verified certifications
Confirmed against the issuing authority - not self-reported.
Mission
Natural history observation
Focus areas & reach
· What they work on and whereHow it stacks up against peers
· vs. 8 similar arts & culture in United StatesConcerns
· 1 red flagWhere every $1 goes
· FY2025 · IRS 990 (FY2025)GiveRadar Analysis
Original analysis from GiveRadar's dataset of comparable organizations
From what GiveRadar has verified so far, Maine Natural History Observatory has a complete profile, cross-referenced across 4 independent sources including the IRS.
- GiveRadar holds a more complete profile for this organization than for 96% of the 133,127 arts & culture charities in the United States it tracks, because GiveRadar has verified its financial disclosures and its governance. Most of those have little verified data on record yet. View this cohort
- GiveRadar has cross-referenced this organization across 4 independent sources, led by the IRS - more than 84% of comparable organizations. See the sources
- It has more complete contact information than nearly all comparable organizations, with a verified website, email, phone and address on record. See national comparisons
- government registration
- financial records (5 filed years)
- disclosed leadership
- a website
- a contact email
- a donation page
- an owner-submitted profile claim
Analysis based on GiveRadar's benchmark dataset of 2026-07-03. It describes what GiveRadar has verified, not a judgment of the organization itself.
Common questions
· Auto-generated from filings + methodologyMaine Natural History Observatory is a registered arts & culture nonprofit based in Gouldsboro, ME, United States. It is registered with the Internal Revenue Service (IRS). It was founded in 2003 and has been operating for 23 years. Its EIN is 200718450. According to GiveRadar's records, it holds active tax-deductible status on the IRS Publication 78 list, which means donations are tax-deductible and the organization is in good standing with the IRS. GiveRadar's Integrity Assessment for the organization is 84/100, which reflects how much public information is available, not whether the charity is legitimate. The organization reports $349K in annual revenue. 27 officers and directors are publicly disclosed. GiveRadar has identified 1 potential concern.
Maine Natural History Observatory's EIN (Employer Identification Number) is 200718450. This is the organization's IRS tax identification number; you can use it to verify tax-exempt status and to look up its Form 990 filings with the IRS.
Maine Natural History Observatory has a GiveRadar Integrity Assessment of 84/100. This score combines five components: Registration (20 pts), Financial Transparency (30 pts), Governance (20 pts), Contact Availability (10 pts), and Data Recency (20 pts), with negative adjustments for any red flags. A score of 84 ('Strong transparency') reflects well-documented governance, recent financials, named leadership, and working contact details. The charity allocates 88% of expenses to programs, which contributes positively to its score. For comparison, the average integrity assessment for arts & culture charities in United States is 90/100.
Maine Natural History Observatory is located in Gouldsboro, ME, United States. The organization was established in 2003 and has been active for 23 years.
Based on official tax filings, Maine Natural History Observatory has $349K in annual revenue. It allocates 88% of expenses to programs and services. This is above the average of 76% for arts & culture charities in United States. Its revenue is below the peer average of $1M. Create a free GiveRadar account to view the complete financial breakdown with year-over-year trends.
Maine Natural History Observatory is classified as an Arts & Culture organization, registered in United States. It operates as a Publicly-supported charity (509(a)(2)). By size, it is categorized as a small organization. It has $349K in annual revenue. The organization has 27 disclosed officers and directors.
GiveRadar has identified 1 potential concern for Maine Natural History Observatory. Red flags are automatically detected from official data and may include high executive compensation relative to budget, low program spending, or missing financial filings. Red flags do not necessarily mean wrongdoing but indicate areas that may warrant further review before donating.
According to GiveRadar's records, Maine Natural History Observatory holds active tax-deductible status on the IRS Publication 78 list, which means donations are tax-deductible and the organization is in good standing with the IRS. It is registered with the Internal Revenue Service (IRS). It reports that 88% of expenses go to programs (the peer average is 76%). You can donate directly through their official donation page linked on their GiveRadar profile. GiveRadar provides data for research and does not endorse any organization. A GiveRadar Integrity Assessment reflects how much public data is available, not whether an organization is safe to donate to, so it is always smart to do your own research before giving.
Maine Natural History Observatory (MNHO) is a nonprofit research organization in Downeast Maine dedicated to documenting, studying, and sharing knowledge about Maine’s plants, animals, and ecosystems. Through scientific research, long-term monitoring, and data archiving, MNHO is working to build a comprehensive understanding of the state’s biodiversity and natural history. The Observatory collaborates with conservation organizations, volunteers, and agencies to collect high-quality biological data, develop natural history educational tools, and make natural history information accessible to scientists, educators, and the public. Its mission is to advance the conservation of Maine’s natural resources by providing reliable data and fostering a deeper appreciation for the state’s rich ecological diversity. Maine Natural History Observatory is classified as an arts & culture organization registered in United States. The organization was founded in 2003.
Among arts & culture charities registered in United States: It allocates 88% of expenses to programs, above the peer average of 76%. Its annual revenue of $349K is below the peer average of $1M.
Yes, donations to Maine Natural History Observatory are generally tax-deductible in the United States. Maine Natural History Observatory is a 501(c)(3) tax-exempt organization. Its EIN is 200718450, which you can use for tax filing purposes. Donors can typically deduct contributions on their federal income tax return if they itemize deductions. Consult a tax professional for guidance specific to your situation.
Filing history
5 years on file from IRS 990 (FY2025): revenue, expenses, program spending, assets, and liabilities by fiscal year.
See 5 years of revenue, expense breakdowns, and balance sheet.
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Tax-deductibility for donors
Donations may be tax-deductible for residents of United States under local rules. Confirm with the charity directly.
MAINE NATURAL HISTORY OBSERVATORY is registered in United States. Donations from the Netherlands to charities outside the EU/EEA are generally not tax-deductible for Dutch donors unless the charity is listed on the Dutch ANBI register with foreign-recognized status.
Always confirm tax treatment with the charity directly or your tax advisor before donating.
Staff & volunteers
From filings and published profiles
Leadership
From FY2025 filing
Officers & trustees (8)
Source: Public filings
8 officers and trustees on file - free with a GiveRadar account.
Latest news
From global news sources
No recent news coverage found
News coverage will appear here when articles mention this organization.
Activity timeline
Filings and press mentions, merged
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Sign up to write a reviewCause areas in United States
How many charities work in each area, with this charity's area highlighted.
Most common causes in United States
Causes charities work on most.
Sources and verification
- Registration and legal identity
- Internal Revenue Service (IRS) - Tax Exempt Organization Search
- Financial filings
- IRS Form 990 filings - Fiscal year 2025 most recent on file.
- Officers and trustees
- Internal Revenue Service (IRS) - Tax Exempt Organization Search - 27 disclosed in the public registry.
- News and media coverage
- GDELT Project + Google News
- Supplementary verification
- Charity Navigator
Data freshness
What we know and don't know
Exactly which public data we hold on this charity. Our score reflects transparency, not impact.
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Financial data · FY2025 on record
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Named leadership · 27 officers on file
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Executive pay · Disclosed
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Government registration · Registered with an official registry
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Mission statement · Published
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Official website · On record
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Headquarters address · On file
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Direct contact · Email or phone published
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Tax-deductibility · Verified
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Founding date · 2003
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Programs & activitiesNo named programs listed by the charity
Methodology
GiveRadar builds each profile primarily from official government charity registries, supplemented where available by third-party nonprofit databases and news archives, and combines it into a single 0-100 integrity assessment. The exact sources for this charity are listed above. We don't take a cut of any donation, ever.
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Quick facts about Maine Natural History Observatory
- What is Maine Natural History Observatory?
- Maine Natural History Observatory is a arts & culture publicly-supported charity (509(a)(2)) based in Gouldsboro, United States. Maine Natural History Observatory (MNHO) is a nonprofit research organization in Downeast Maine dedicated to documenting, studying, and sharing knowledge about Maine’s plants, animals, and ecosystems. Through scientific research, long-term monitoring, and data archiving, MNHO is working to build a comprehensive understanding of the state’s biodiversity and natural history. The Observatory collaborates with conservation organizations, volunteers, and agencies to collect high-quality biological data, develop natural history educational tools, and make natural history information accessible to scientists, educators, and the public. Its mission is to advance the conservation of Maine’s natural resources by providing reliable data and fostering a deeper appreciation for the state’s rich ecological diversity.
- When was Maine Natural History Observatory founded?
- Maine Natural History Observatory was founded in 2003.
- Who leads Maine Natural History Observatory?
- Glen Mittelhauser serves as Treasurer/Exec Dir.
- Where is Maine Natural History Observatory located?
- Headquartered in Gouldsboro, ME, United States.
- What is Maine Natural History Observatory's annual budget?
- Annual revenue for fiscal year 2025 is approximately $100K-$1M. 88% of expenses go to program services.
- Is Maine Natural History Observatory trustworthy?
- Maine Natural History Observatory has a GiveRadar Integrity Assessment of 84 out of 100 (Strong transparency). The score reflects public-data transparency: registration, financial disclosure, governance, contact details, and how recently data was refreshed. It does not measure program impact.
- What is Maine Natural History Observatory's registration number?
- IRS EIN: 200718450.
- What is Maine Natural History Observatory's website?
- http://www.mainenaturalhistory.org