Manx Wildlife Trust
Manx Wildlife Trust was founded on 6 March 1973 and is the Isle of Man’s leading nature conservation charity.
As of May 2025, MWT manages 32 nature reserves, including the Calf of Man which is managed with and on behalf of Manx National Trust. These reserves total, or around 2% of the Isle of Man and include:
| Name | Acquired | Area | Notes |
| Aust | 2016 | ||
| Ballachrink | 2011 | Part of the Renscault & Ballachrink Bird Sanctuary | |
| Ballachurry | 2016 | ||
| Ballamooar Meadow | 1994 | ||
| Barnell Reservoir | 1974 & 1984 | Part of the Ballamoar Bird Sanctuary | |
| Billown | 2023 | Includes Rosehill Quarry ASSI | |
| Breagle Glen and Cronk Aash | 1988, 1991 & 2010 | ||
| Calf of Man | N/A | Owned by Manx National Trust, co-managed in partnership with Manx Wildlife Trust since 2006. Candidate Ramsar site | |
| Close e Quayle | 1994 & 2003 | ||
| Close Sartfield | 1987 | Part of the Ballaugh Curraghs ASSI and Ramsar Site | |
| Close Umpson | 1995 | Part of the Ballaugh Curraghs ASSI and Ramsar Site | |
| Cooildarry | 1976 & 1979 | ||
| Creg y Cowin | 2023 | ||
| Cronk y Bing | 1989 | An Area of Special Scientific Interest | |
| Curragh Feeagh | 1986 | ||
| Curragh Kiondroghad | 1988 & 1990 | ||
| Dalby Mountain | 1995 & 2024 | Candidate Ramsar site, Part of the "Isle of Man Hills" Important Bird & Biodiversity Area | |
| Dalby Mountain Fields | 1995 | Part of the "Isle of Man Hills" Important Bird & Biodiversity Area | |
| Dobbie's Meadow | 2013 | ||
| Earystane | 1998 | ||
| Fell's Field | 1998 | ||
| Glen Auldyn | 2025 | Part of the "Isle of Man Hills" Important Bird & Biodiversity Area | |
| Glen Dhoo | 1995 | ||
| Glion Darragh | 2024 | ||
| Goshen | 1995, 1998, 2008 & 2023 | Part of Ballaugh Curraghs ASSI and Ramsar Site | |
| Hairpin Woodland Park | 2019, 2022, 2024 & 2024 | ||
| Lough Cranstal | 1989 & 2022 | Candidate Ramsar site | |
| Lough Gat e Whing | 2016 | ||
| Miss Guyler's Meadow | 1989 | ||
| Moaney & Crawyn's Meadows | 1995 | Part of the Ballaugh Curraghs ASSI and Ramsar Site | |
| Mullen e Cloie | 2008 | ||
| The Keyllagh | 2024 | ||
| Total | This represents approximately 2% of the Isle of Man's land area |