Eulemur sanfordi
In 3 days ~80% 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 40% of wildlife watchers report a Sanford's Brown Lemur sighting in Ankarana National Park on a given day, based on 14 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 5th most-seen of the 9 mammals we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
February and September
In those months about 60% of wildlife watchers report a Sanford's Brown Lemur in Ankarana National Park on a given day, against about 10% in April–June, August and December, the lowest months. March has too few records to rate.
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.
2nd of 2
Of the 2 parks where we can rate Sanford's Brown Lemur sightings, Ankarana National Park ranks 2nd at about 40%. The best odds are in Montagne d'Ambre National Park (Madagascar, about 50%).
GBIF citizen-science records
It is estimated from how often the Sanford's Brown Lemur is recorded against all the mammals logged in Ankarana National Park (14 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.
