The lake itself includes a 2-km stretch of lake bank of majestic, 100-foot-tall Mauritia palms with hundreds of not just small and large macaws but also of three species of monkeys. Squirrel Monkeys jump on lake edge vines a mere 3-6 meters from our unique, silent, hand-paddled guest catamarans.  SouthWild scientists were the first in the Amazon to construct and use stable, roomy guest catamarans, first in Manu, and then at Sandoval and other parts of the Peruvian Amazon. The energetic groups of 50-100 Squirrel Monkeys willingly follow troops of 14 Brown Capuchins, as the capuchins give early warnings of attacking eagles. High in the canopy on the lake-edge, large, deliberate, handsome Red Howler Monkeys browse on new leaves and occasionally blast out the loudest, lion-like roars of the world’s 15 species of Howlers. Guests who have never heard Red Howlers roar at dawn often are startled and scared by the impressive calls, but howlers are gentle, strict vegetarians who would not hurt a fly.