Here are top eco‑luxury resorts in Sri Lanka (carefully selected for strong sustainability credentials, wildlife/rewilding focus, and high-end comfort). Each listing includes location, what makes it eco‑friendly, the guest vibe, and an approximate price tier (nightly ranges vary by season and room type—check current rates).

1. Jetwing Vil Uyana — Sigiriya (central dry zone)

• Why it’s eco: built on restored man‑made wetlands and paddy fields; rainwater harvesting, onsite wastewater treatment and biogas/compost systems; active biodiversity/wetland restoration and local-hire programmes. (jetwinghotels.com)
• Vibe: intimate thatched villas overlooking marsh, paddy or forest; superb for birding and loris/night‑walks.
• Price tier: luxury (mid-to-high, often $200–$600+ depending on villa).

2. Anantara Peace Haven Tangalle — Tangalle / south coast

• Why it’s eco: extensive conservation programmes (mangrove restoration, turtle conservation with partners such as IUCN/DWC), rainwater harvesting, on‑site bottling, reduced plastics and composting/wastewater treatment. (Anantara.com)
• Vibe: luxury beach resort with strong conservation activities and educational nature walks.
• Price tier: luxury (varies widely by season).

3. Heritance Kandalama — Dambulla / Cultural Triangle

• Why it’s eco: long‑standing eco ethos (building integrated into the landscape), energy/waste innovations (recycling, papermaking initiatives), and a forest sanctuary that supports wildlife. Highly regarded as an early national model of eco‑hospitality. (cntraveler.com)
• Vibe: architecturally striking hotel built into a rock/forest setting; great base for Sigiriya/Polonnaruwa tours.
• Price tier: luxury.

4. Ulagalla by Uga Escapes — Anuradhapura / backcountry (large private villa estate)

• Why it’s eco: LEED/green building practices, solar and biogas use, water‑treatment and organic farm‑to‑table programmes; strong community engagement policies. (ugaescapes.com)
• Vibe: privately‑spaced villas in restored agricultural/forest land — very private, peaceful, ideal for slow stays.
• Price tier: luxury (villa rates).

5. Chena Huts by Uga Escapes — Yala / south east (near Yala NP)

• Why it’s eco: low‑impact materials and design (thatched huts), solar power, on‑site organic gardens and natural waste/seaweed treatment for fertilizer; close integration with nearby wild landscapes. (purebreaks.com)
• Vibe: contemporary “safari” huts with jungle/beach proximity — great for Yala safaris and relaxed wilderness stays.
• Price tier: luxury-mid (varies).

6. Wild Coast Tented Lodge — Yala coast / south

• Why it’s eco: tented design using natural materials; small‑footprint camps on coastal scrub bordering Yala National Park with a strong wilderness/rewilding aesthetic and emphasis on local guides/nature experiences. (Featured in recent travel coverage for its low‑impact luxury.) (vanityfair.com)
• Vibe: luxe safari tents with private plunge pools and close access to coastal safaris; dramatic coastline setting.
• Price tier: luxury.

7. Cape Weligama — South coast (Mirissa / Weligama)

• Why it’s eco: embraces local sourcing, coastal conservation initiatives and designs that use local materials; positioned for responsible coastal experiences (whale/sea turtle awareness and community partnerships are typical at properties in this group). (vogue.com)
• Vibe: cliff‑top villas and “rustic‑luxury” ocean views — excellent for coast, surf and whale‑watching trips.
• Price tier: upper‑luxury.

Quick tips if you’re choosing:

• Best for wildlife (birds/loris): Jetwing Vil Uyana.
• Best for beach + marine conservation: Anantara Peace Haven Tangalle or Cape Weligama.
• Best for safari/close‑to‑Yala wildlife: Wild Coast Tented Lodge or Chena Huts.
• Best for remote private‑villa, slow travel: Ulagalla.
• If sustainability certification matters to you, ask resorts for their latest certifications (e.g., Green Growth/Green Globe/LEED) and for specifics on waste, water and community programmes before booking—policies and certifications can change.

If you’d like, I can:

• Compare two or three of these by exact rates and availability for your travel dates (I’ll need the dates); or
• Send a short shortlist matched to your priorities (beach vs safari vs cultural triangle) and travel budget.

Which would you prefer me to do next?