By Portia Jones The air is thick under the humid rainforest canopy in Peru’s Amazonian basin. Insects hum and the squawks of circling macaws echo through the trees. I’m silently crouching on the forest floor when the rainforest ambience is briefly interrupted by gasps as a large tarantula leaps out of a hole and darts toward me. It’s not entirely unexpected, though, as our Posada Amazonas lodge rainforest guide, Ines Duran Perdomo, has been gently stroking the outer rim of a tarantula burrow with a twig. She’s doing this to try and lure out the resident spider for the assembled visitors. A mom…