Eulemur sanfordi
In 3 days ~90% in a week >90%
Sanford's brown lemur (Eulemur sanfordi), or Sanford's lemur, is a species of strepsirrhine primate in the family Lemuridae. Sanford's brown lemur was previously considered a subspecies of the common brown lemur (Eulemur fulvus) but was raised to full species in 2001. It is named after Leonard Cutler Sanford, a trustee of the American Museum of Natural History.
Sanford's brown lemur is a medium-sized lemur with a head-to-body length of 38–40 cm (15–16 in), a tail length of 50–55 cm (20–22 in), an overall length of 88–95 cm (35–37 in), and a body weight of 1.8–1.9 kg (4.0–4.2 lb).
This species is sexually dichromatic. Males have a gray to brown dorsal coat which darkens as it reaches the hands, feet and base of the tail. Ventral coat is pale gray to brownish-gray and the tail is dark gray. The nose, muzzle and face are black, with the surrounding area solid white or light gray. Features that distinguish this species from the white-fronted brown lemur are the more prominent ear and cheek tufts. In this species the hair around the ears and on the lower cheek is noticeably longer and has a 'spiked' appearance, while the white-fronted lemur males have a very rounded...
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Montagne d'Ambre National Park | 🇲🇬 Madagascar | |
| 2 | Ankarana National Park | 🇲🇬 Madagascar |
Likely
About 50% of wildlife watchers report a Sanford's Brown Lemur sighting in Montagne d'Ambre National Park on a given day, based on 31 verified sightings from GBIF citizen-science data from 2019 to 2026. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
January and September
In those months about 70% of wildlife watchers report a Sanford's Brown Lemur in Montagne d'Ambre National Park on a given day, against about 10% in February, April, June and December, the lowest months. Those are among Montagne d'Ambre National Park's wettest months, with about 230 mm of rain a month against 40 mm in August.
Between 11 am and 2 pm
Across all the parks we cover, that three-hour window holds the most Sanford's Brown Lemur sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 2 parks where we can rate Sanford's Brown Lemur sightings, Montagne d'Ambre National Park has the highest daily chance: about 50%. Next come Ankarana National Park (Madagascar, about 40%).
GBIF citizen-science records
It is estimated from how often the Sanford's Brown Lemur is recorded against all the mammals logged in Montagne d'Ambre National Park (31 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
