Avahi meridionalis is similar in size to A. laniger and A. peyrierasi, with a head-body length of 23–29 cm, a tail of 30–33 cm, a total length of 58.4–69.6 cm, and a weight of 950–1,400 g (Zaramody et al., 2006; Lei et al., 2008). The dorsal fur is gray-brown toning down to light gray distally, and the ventrum is gray. The tail is red-brown and darkens distally (Zaramody et al., 2006).
As of 2010, this species had not been studied in the wild.
Southeastern Madagascar. The southernmost woolly lemur, this species is apparently restricted to Andohahela National Park and the area of Sainte-Luce (Zaramody et al., 2006). Further studies are required to determine the exact distribution, and especially its limits in relation to neighboring species (Avahi peyrierasi and Avahi ramanantsoavanai).
The 2008 IUCN Red List assessment (2008) classified A. meridionalis as Data Deficient (DD). It is known to occur in three protected areas (Andohahela National Park, the Sainte- Luce Private Reserve, and the Mandena Conservation Zone) (Zaramody et al., 2006; Andriantompohavana et al., 2007).
As of 2010, this species was not being kept in captivity (I. J. Porton, pers. comm.).
Our best recommendation for seeing this species is in the Mandena Conservation Zone (near Tolagnaro = Fort-Dauphin), although a nocturnal visit to the rain forest portion of Andohahela National Park may also produce results.