Nature guide · Nosy Be
Wildlife and plants of Nosy Be
When to come, where to look, and what you can realistically see.
Lokobe for forest, Tanihely for reef life and open water for cetaceans: each habitat has its own rhythm and useful windows.
The animal scenes were recreated with the built-in image tool from real photographs or zoological plates cited below. They remain illustrations, not field sighting records.
Best all-round window
September–October
Generally drier Lokobe trails, resident turtles at Tanihely, humpbacks still present and the beginning of whale shark season.
Wildlife sightings are never guaranteed. Weather, sea state, tides and animal activity may change or cancel an outing.
12 months, eight markers
Nosy Be wildlife calendar
Green marks the strongest window; orange means possible or opportunistic; neutral marks a weak period or a sighting too rare to plan around.
| Wildlife & plants | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Black lemurs & Lokobe forestLokobe National Park | ||||||||||||
| Brookesia, geckos & amphibiansLokobe humid understorey | ||||||||||||
| Sea turtles & coral reefNosy Tanihely National Park | ||||||||||||
| Coastal & offshore dolphinsNosy Be coasts and open water | ||||||||||||
| Humpback whalesOffshore Nosy Be | ||||||||||||
| Whale sharksCoastal waters, outside parks | ||||||||||||
| Omura’s whale & rare cetaceansOuter shelf towards Nosy Iranja and Ampasindava | ||||||||||||
| Ylang-ylang flowersPlantations, outside parks |
Black lemurs & Lokobe forest : Present year-round; trails are generally more comfortable during the drier months.
Brookesia, geckos & amphibians : Activity rises with heat, humidity and rain; proper walking shoes are essential.
Sea turtles & coral reef : The park is open year-round; drier months often make the boat trip and water conditions easier.
Coastal & offshore dolphins : Regional populations are documented, but no robust month-by-month peak is published. Orange means a possible encounter, not an abundance calendar.
Humpback whales : Practical July–October window, usually strongest in the heart of the austral winter.
Whale sharks : Documented aggregation from September to December, with October and November at its core.
Omura’s whale & rare cetaceans : Omura’s whale is probably resident but too rarely encountered to build a trip around. Other large cetaceans are equally opportunistic.
Ylang-ylang flowers : Flowering extends through the year, with the best period from March to May and another productive period from June to November. December to February is less favourable during cyclone season.
Choose the right habitat
Which park is best for wildlife viewing?
There is no single all-purpose park. The right choice depends on forest, reef or open ocean. Ylang-ylang belongs to a cultivated landscape, not a nature reserve.
National park · Forest
Lokobe
- Best for
- Black lemurs, mouse lemurs, Brookesia, leaf-tailed geckos, forest birds and Dypsis palms.
- When
- May to November for easier walking; November to April for increased reptile and amphibian activity.
- Field note
- Start early and take a park guide. The Kindro circuit notably focuses on endemic palms and small wildlife.
862 ha, including 740 terrestrial hectares; 192 plant species recorded by Madagascar National Parks.
National park · Reef
Nosy Tanihely
- Best for
- Green and hawksbill turtles, reef fish, corals, invertebrates and accessible snorkelling.
- When
- Year-round; May to November is usually the simplest window. Mornings often mean less wind, traffic and heat.
- Field note
- Match the outing to tide and sea state, stay horizontal above the reef and never pursue a turtle.
154 fish species, 110 coral species and two marine turtle species have been recorded.
Open ocean · Outside parks
Western Nosy Be waters
- Best for
- Humpbacks, whale sharks and dolphins; other large cetaceans remain rare encounters.
- When
- July–October for humpbacks; September–December for whale sharks. Dolphins have no comparable short season.
- Field note
- Use an operator trained in approach codes. A large share of documented whale shark habitat lies outside protected areas.
Seven dolphin species are identified in the seascape and at least 21 cetacean species are documented across the wider region.
Cultivated landscape · Outside parks
Ylang-ylang plantations
- Best for
- Mature flowers, low-pruned trees, early harvest work and traditional distillation.
- When
- Best from March to May, then productively flowering from June to November. Harvest takes place early in the morning.
- Field note
- Do not confuse this emblematic crop with Lokobe’s endemic flora. They tell two different stories of the island.
Cananga odorata is a cultivated Southeast Asian species that became a historic marker of Nosy Be’s landscape.
Read the habitats
Species and landscapes not to mix up
Sambirano forest
The smallest wildlife is often the rarest
Lokobe protects a remnant of humid lowland forest. The search is as much for black lemurs as for tiny Brookesia chameleons, Uroplatus geckos, frogs and mouse lemurs. Rain makes walking harder but activates part of this discreet community.
- Move slowly, early in the day, with a guide who can read the understorey.
- Dypsis palms, Diospyros ebony trees and humid-forest canopy species.
- No feeding: the point is wild behaviour, not a staged photograph.
Fringing reef
See turtles without staging the encounter
Tanihely brings reef fish and turtles together in a protected area close to Nosy Be. A turtle surfacing to breathe must keep its path. A good encounter is one that did not force the animal to change its behaviour.
- Both green and hawksbill turtles are recorded in the park.
- Mask, snorkel, sound buoyancy and reef-conscious sunscreen.
- Never touch coral, collect shells or block a turtle’s route.
Marine megafauna
Far more than two headline species
Humpback whales and whale sharks provide the two clearest seasonal windows. Nosy Be also supports coastal Indian Ocean humpback and Indo-Pacific bottlenose dolphins, with spinner and pantropical spotted dolphins offshore. Probably resident in the northwest, Omura’s whale is far harder to encounter.
- Humpbacks: July–October; whale sharks: September–December.
- Seven dolphin species are recorded in the Nosy Be seascape.
- Omura’s and Bryde’s whales, blue whales, sperm whales and beaked whales are documented but cannot be planned.
- Prefer a trained guide and the approach distances set by Cétamada charters.
Wild & cultivated plants
Endemic palms on one side, ylang-ylang on the other
Nosy Be’s wild botanical signature is found in Lokobe: endemic palms, ebony trees and humid-forest species. Ylang-ylang is an introduced crop shaped by people. It can flower year-round; mature blossoms are picked early to preserve their aromatic oils.
- Lokobe’s Kindro circuit was designed around palm observation.
- Visit ylang-ylang in plantations or distilleries, not in a park.
- April–June is a useful window for the main harvest.
Build your stay
What should you prioritise for your dates?
The best season is different for a herpetology enthusiast, a keen walker and someone travelling for marine megafauna.
Active forest, demanding weather
Heat, humidity and rainfall favour amphibian and reptile activity. Trails can be slippery and sea outings are more easily disrupted.
Best for : Understorey wildlife, reptiles, amphibians and lush vegetation.
A green island in a gentler transition
Rainfall eases, the forest remains dense and ylang-ylang enters a strong harvest period. Tanihely and Lokobe become easier to combine.
Best for : Plants, ylang-ylang, turtles and early long nature itineraries.
Humpbacks and drier trails
This is the heart of the austral winter: humpback whales use the region while terrestrial conditions are generally more comfortable.
Best for : Humpback whales, Lokobe, snorkelling and hiking.
The strongest overlap
The final strong weeks for humpbacks meet the start of whale shark season. Dry-season conditions still favour Lokobe and Tanihely.
Best for : A complete forest, reef and marine-megafauna trip.
Whale sharks and returning rain
Whale sharks remain the marine focus. Early rains reactivate the understorey, while sea and access conditions become more variable.
Best for : Whale sharks, reptiles, amphibians and humid-forest photography.
The animal decides
Watch without disturbing
In Nosy Be, the quality of an encounter is also measured by what the animal did not have to endure.
Keep your distance
Do not touch, feed, surround or chase. If the animal moves away, the encounter is over.
Stay on the route
Follow park paths and instructions in Lokobe. In the water, never stand or rest on coral.
Choose trained operators
For whales, dolphins, whale sharks and turtles, ask for Cétamada approach charters to be applied.
Accept a plan B
Rough seas or intense rain are not commercial failures: cancelling can be the only sound decision.
Quick answers
Before choosing your park
If I can visit only one park, which one should it be?
Lokobe for terrestrial wildlife and plants; Nosy Tanihely for turtles, fish and coral. Neither is a substitute for the other.
What is the best month to combine everything?
September has the widest overlap; October improves the whale shark window. For whale sharks alone, October–November is more targeted.
Is Nosy Komba the best park for lemurs?
Nosy Komba is not a national park. To look for lemurs in forest habitat and experience broader biodiversity, Lokobe is the reference choice.
Can turtles be seen year-round?
Yes. Tanihely is accessible throughout the year and turtles are resident, although visibility and safety depend on that day’s sea, tide and weather.
Which other cetaceans can genuinely be encountered?
Indian Ocean humpback and Indo-Pacific bottlenose dolphins occur near shore, with spinner or pantropical spotted dolphins offshore. Omura’s and Bryde’s whales, blue whales, sperm whales and beaked whales are documented, but a serious operator will not promise them.
Evidence base
Sources and method
Calendar checked on 19 August 2026 against official park pages, conservation organisations and scientific papers. Practical windows combine biological presence and access conditions; they do not promise a sighting.
- Madagascar National Parks — Lokobe ↗Habitats, species, plants, circuits and visitor rules.
- Madagascar National Parks — Nosy Tanihely ↗Marine biodiversity, turtles, coral, fish and year-round access.
- Diamant et al. — Aquatic Conservation ↗September–December whale shark aggregation and habitat around Nosy Be.
- Fabietti et al. — Biology ↗Humpback whale observations around Nosy Be during the breeding season.
- WCS — Nosy Be seascape ↗Northwest Madagascar’s role for cetaceans, turtles, seabirds and reefs.
- WCS — Nosy Be seascape factsheet ↗Seven identified dolphin species and documented large-cetacean diversity.
- Caputo et al. — Marine Mammal Science ↗Indian Ocean humpback and Indo-Pacific bottlenose dolphins around Nosy Be.
- Cerchio et al. — Marine Mammal Commission ↗Multi-year surveys of Nosy Be’s coastal and offshore dolphins.
- Cerchio et al. — Royal Society Open Science ↗First genetic and ecological documentation of northwest Madagascar’s Omura’s whales.
- Marine Mammal Protected Areas Task Force ↗At least 21 cetacean species documented across the wider Nosy Be region.
- Cétamada — Ecotourism ↗Approach charters and the framework for marine megafauna viewing.
- Journal of Natural History — amphibian activity ↗Higher rainforest amphibian activity during Madagascar’s warm, rainy season.
- Ylang-Ylang Nosy Be — production ↗Flowering, blossom maturity and local harvest timing.
- Wikimedia Commons — male black lemur in Lokobe ↗Photographic reference used for Eulemur macaco morphology.
- Wikimedia Commons — Brookesia minima in Lokobe ↗Photographic reference used for the minute chameleon’s silhouette, scale and texture.
- Wikimedia Commons — Chelonia mydas ↗CC0 photograph used as the green turtle’s anatomical reference.
- Wikimedia Commons — whale shark anatomy ↗Public-domain zoological plate used to lock Rhincodon typus’s complete silhouette.
- NOAA / Wikimedia Commons — whale shark at the surface ↗Photograph used for body volume, dorsal ridges and natural skin appearance.
Your dates change the plan
Build a coherent nature day
Share your dates, what you genuinely want to see, and your comfort level in the water or on a trail. Ginot can suggest the right site, timing and a realistic plan B.
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