Measuring 10ft across, the huge nest was discovered in California by Robert McDougal.
Mexican free-tailed bats have the remarkable ability to sabotage the food finding efforts of their peers.
More than 107 million orb-weaver spiders are thought to be responsible for the spectacle.
Where once there were just 15 Espanola giant tortoises left there are now more than 1,000.
Compared to humans, spiders are capable of some impressive feats of speed, strength and endurance.
One of the last remaining northern white rhinos has died leaving only six left alive in the whole world.
A two-man submersible was attacked by a pair of the invertebrates during an expedition in the Bering Sea.
The massive swarm of bees had been unwittingly unleashed by two men working at a house in Arizona.
Massive numbers of the seaborne mammals hauled themselves on to the shoreline for a bit of a rest.
Researchers have captured evidence of chimpanzees learning a new type of tool use from one another.
A species of rat thought to be extinct has been rediscovered near the Incan city's ruins in Peru.
Real-life clownfish have more in common with their big screen counterpart than was previously believed.
A particularly deadly big cat is thought to have killed 12 people from remote Himalayan villages.
A woman from Essex returned from the supermarket to find a clutch of strange eggs on a bunch of bananas.
A conservation success story off the coast of California has seen blue whales thriving in recent years.
A bizarre and unclassifiable type of mushroom-shaped sea creature has been identified by researchers.
The effects of the Chernobyl nuclear disaster are still being felt in Europe more than 28 years later.
Scientists compared the development of walking fish raised on land with that of those raised in water.
Teenager Meghan LaPlante discovered the crustacean while checking lobster traps at the weekend.
A cross between coyotes and wolves has been taking over in some areas of the United States.