By: Erin Ruberry
Next time you're trekking through the rainforest in Guyana, look out for a spider the size of a small dog.
Entomologist Piotr Naskrecki spotted the massive South American Goliath birdeater (Theraphosa blondi) on a nighttime walk through the rainforest. As he writes on his blog,
"Although far from being the largest member of the subphylum Chelicerata – this honor belongs to horseshoe crabs – Goliath birdeaters are ridiculously huge for a land arthropod. Their leg span approaches 30 cm (nearly a foot) and they weigh up to 170 g – about as much as a young puppy."
When Naskrecki approached the creature, as detailed in his blog post titled 'The sound of little hooves in the night,' the spider "would start rubbing its hind legs against the hairy abdomen" and made a hissing noise.
See photos of the puppy-sized spider on The Smaller Majority.
Learn about more alarming arachnids on Science Channel: