More recently, scientists gave the Aesop's Fable test to some raccoons. Researchers have adopted the well-known parable of a crow throwing stones into a pitcher to cause the water level to rise as a benchmark for animal intelligence. Raccoons were put in a space with a water cylinder, marshmallows floating on top, and stones strewn about it. They had to raise the water level first by dumping the stones before they could get to the sweet treats. Two of the eight raccoons imitated the action after being shown how to do it, but a third approached the issue differently and knocked the entire structure over.
In the early 20th century, raccoons were poised to become the go-to model for animal experiments. They were some of the most curious and intelligent animals available, scientists believed, so that meant they were an obvious choice for comparative psychology studies. Though raccoons were the subject of several psychology experiments at the turn of the century, they didn't stick around in labs for long. Unlike rats, they were hard to breed and maintain in large numbers. They also had the pesky tendencies to chew through their cages, pickpocket researchers, and hide out in air vents. Despite one researcher's plan to breed a tamer strain of raccoon, the creature's future in the lab never took off.
For generations, raccoons have been stereotyped as the cunning thief or trickster character in literature because of the black marks that fall across their eyes. But in addition to giving them the appearance of cute outlaws, their well-known black masks also provide them the ability to see perfectly. Dark to the black stickers that athletes wear beneath their eyes, the black fur works by absorbing light that would otherwise bounce into the athlete's eyes and impair vision. Less peripheral light during the night, when raccoons are most active, makes it simpler for them to detect contrast in the objects of their focus, which is crucial for seeing in the dark.
In the early 20th century, raccoons were poised to become the go-to model for animal experiments. They were some of the most curious and intelligent animals available, scientists believed, so that meant they were an obvious choice for comparative psychology studies. Though raccoons were the subject of several psychology experiments at the turn of the century, they didn't stick around in labs for long. Unlike rats, they were hard to breed and maintain in large numbers. They also had the pesky tendencies to chew through their cages, pickpocket researchers, and hide out in air vents. Despite one researcher's plan to breed a tamer strain of raccoon, the creature's future in the lab never took off.
Do raccoons die from rabies? Raccoons—along with foxes (red and gray), skunks, and bats—are considered a primary carrier of the rabies virus in the United States. While any warm-blooded animal can carry rabies, these are the ones we call “rabies vector species.”
Can humans get raccoon roundworm? The species commonly found in raccoons is Baylisascaris procyonis. When infective eggs of this roundworm are ingested by humans, Baylisascaris larvae hatch in the intestine and travel through the organs and muscles. Infected raccoons shed millions of eggs in their feces.
If you give raccoons a problem, they'll typically figure out how to solve it as long as there's food involved. They have repeatedly demonstrated this in labs in addition to yards and campsites. Early in the 20th century, ethologist H.B. Davis presented 12 raccoons with a set of locks to pick. They had to negotiate hooks, bolts, buttons, latches, and levers to get to the rewards inside the boxes; some of the boxes had multiple locks. The raccoons eventually managed to bypass 11 of the 13 defenses.