The islands are crisscrossed by small paths connecting one beach to another, but be prepared to sweat and swat off bugs if you tackle any of these. There is a good chance to see big monitor lizards and large spiders between Long Beach and Coral Bay, and if you are walking off the main trails, you are likely to spot some wild monkeys if you are lucky.
There is a wide trail (30 mins) between Watercolours Paradise and Arwana on Besar, you can see large termite trails, monitor lizards, big fruit bats and sometimes monkeys.
There is a paved walking trail from Coral Bay to Mira Beach (30 minutes) and on to Impiani beach (20 mins) and to the main fishing village on Kecil (20 mins). This is a great trail to see monitor lizards.