Here are some facts about Lemur:

1. This lemur’s name is Black and white ruffed lemur(Varecia variegata). They are endemic to the island of Madagascar, like all lemures species, they can only be found there.
2. They make nests for their young, like birds. Female lemurs often give birth to twins or triplets after a 90-120 gestation period, then the newborn will be placed in the nest on the tree 10 to 20 metres above the ground. The young stay in the nest while the female forages. When a female needs to travel with her young, she carries the in her mouth, like dogs, rather than her belly.
3. The B&W lemurs are known as the world’s largest pollinators, due to their mutualistic relationship with the traveller’s tree. As they are primarily frugivorous, the tree benefits from the pollination that occurs when the pollen sticks to the lemurs’ faces and gets transported to the next tree.
4. Lemurs are among the most threatened groups of mammals. The International Union for the Conservation of Nature (IUCN) estimates that over 95% of lemurs face extinction in the next 20 years. The primary threats facing black-and-white ruffed lemurs include logging, slash-and-burn agriculture, mining, development, and hunting. Their large size and diurnal activities make them easier targets for hunters and this has put great pressure on their population. Protecting and preserving lemur habitats in Madagascar is essential to their survival.

Here are some facts about gelada:

1. Geladas are also known as “bleeding-heart monkeys”, you will know why when you look at them.
2. These baboon-size animals are the world’s most terrestrial primates, except for humans. As mostly grass-eaters, they are the last surviving species of ancient grazing primates that were once numerous. 
3. Geladas live in multi-level societies. Sometimes geladas sill form large herds of up to 1200 individuals. These are some of the largest groups observed among any primate. Geladas can form such large groups because they feed mostly on grass, which is widely available. However, a diet of nutrient-poor grasses means 10 hours of grazing per day, compared to just 4 hours a day for the average monkey.
4. Good at communications. Because geladas spend so much time foraging, they are unable to properly bond through grooming, like many other primates. Walk through a band of geladas foraging and you will be deafened by the sounds of grunts, groans, and squeals, over 30 of which have been identified by researchers so far.