<p>Galapagos giant tortoises rest in a pool of mud in Volcan Alcedo’s crater on Isla Isabela. Many animals are nocturnal to avoid the heat of the day.</p>
Galapagos giant tortoises rest in a pool of mud in Volcan Alcedo’s crater on Isla Isabela. Many animals are nocturnal to avoid the heat of the day.
- Photography
- Photo Gallery
Photos Reveal the Hidden World of Animals at Night
While some animals settle down as the sun begins to set, others are just starting to come alive.
Unlock this story for free
Create an account to read the full story and get unlimited access to hundreds of Nat Geo articles.