
Crab Facts: Claws, Shells & Secret Behaviors
Crabs are crustaceans found on every continent with over 7,000 species. Discover why crabs walk sideways, trade shells, and grow claws stronger than jaws.

Capybaras are the world's largest rodents weighing up to 140 pounds. Learn about their social behavior, aquatic lifestyle, and gentle nature.
Capybaras are the largest rodents in the world, native to South America. These gentle giants can weigh up to 146 pounds and measure over 4 feet in length.
Capybaras have barrel shaped bodies covered in coarse reddish brown to grayish fur. Adult capybaras typically weigh between 77 and 146 pounds, with females usually larger than males. They stand about 20 to 24 inches tall at the shoulder.
Capybaras inhabit diverse wetland environments across South America. They are found in countries including Brazil, Venezuela, Colombia, Argentina, and Paraguay. Capybaras always live near bodies of water such as rivers, lakes, swamps, and flooded grasslands.
Capybaras are strict herbivores that primarily eat grasses and aquatic plants. They graze for several hours each day, consuming up to 8 pounds of vegetation. Capybaras have a unique digestive system that allows them to extract nutrients from tough plant material.
Capybaras are extremely social animals that live in complex hierarchical groups. Typical groups consist of 10 to 20 individuals, though groups can exceed 100 during the dry season when they gather near limited water sources. Each group includes a dominant male, several females, their offspring, and subordinate males.
Females reach sexual maturity around 12 to 18 months of age. After a gestation period of 130 to 150 days, females give birth to litters of 4 to 5 pups on average. Pups can also eat grass just a few days after birth, though they continue nursing for about 16 weeks.
They can swim at speeds up to 22 mph when escaping danger. Capybaras can stay completely submerged for up to 5 minutes to hide from predators. This semi aquatic behavior distinguishes capybaras from most other rodents.
Indigenous peoples of South America have hunted capybaras for meat and leather for thousands of years.
Spanish colonizers sought Vatican approval to eat capybaras during Lent, resulting in the famous fish classification.
Capybaras were among the exotic animals that amazed European naturalists when first documented in the 1500s.
The species name comes from Tupi language meaning 'grass eater,' reflecting their simple herbivorous diet.
Research found capybaras can hold their breath underwater for up to 5 minutes to hide from predators.
Studies showed capybaras have a unique digestive system that requires them to eat their own feces to fully digest food.
Scientists discovered capybaras communicate through a variety of clicks, whistles, and barks.
Behavioral research confirmed capybaras genuinely tolerate other species rather than simply ignoring them.
Capybaras became internet celebrities, spawning countless memes about their relaxed nature.
The 'OK I pull up' capybara meme introduced millions worldwide to the species.
Japan's capybara hot spring baths became a popular tourist attraction.
Capybaras are increasingly kept as exotic pets, though they require specialized care and are illegal in many places.
Before social media, capybaras were relatively unknown outside South America. They were hunted for meat, farmed for leather, and occasionally kept in zoos, but most of the world had never heard of them or seen their remarkably friendly behavior with other species.
The internet transformed capybaras into global celebrities. Viral photos of capybaras with other animals spawned countless memes. Japanese hot spring capybaras became tourist destinations. The species went from obscure rodent to beloved icon, though this fame has also increased problematic exotic pet demand.
Capybaras are the world's largest rodents, weighing up to 146 pounds and measuring over 4 feet long
They can hold their breath underwater for up to 5 minutes to hide from predators like jaguars and anacondas
Capybaras are so friendly that birds often perch on their backs to catch insects and rest
All female capybaras in a group help care for each other's babies, demonstrating cooperative parenting
Their scientific name Hydrochoerus hydrochaeris means water hog, referring to their semi aquatic lifestyle
Capybaras eat their own feces to extract maximum nutrients from the tough grasses they consume
Capybaras are thriving in urban areas of South America, adapting to parks and golf courses
They serve as ecosystem engineers, creating grazing areas that benefit other species
Climate change may expand capybara range southward in South America
Their popularity has increased demand for exotic pet ownership, raising welfare concerns
Capybaras carry ticks that can transmit spotted fever to humans in urban settings
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Capybaras are the world's largest rodents, weighing up to 140 pounds, essentially giant guinea pigs.
They must eat their own feces to properly digest food, a process called cecotrophy.
Capybaras can sleep underwater with just their noses above the surface.
Their webbed feet make them excellent swimmers, and they mate exclusively in water.
Baby capybaras can eat grass within a week of birth and swim almost immediately.
A group of capybaras is called a herd, and they can contain up to 100 individuals during dry season.
Capybaras are the world's largest rodents, reaching weights of 77 to 146 pounds and lengths of 3.5 to 4.4 feet. They stand about 20 to 24 inches tall at the shoulder. Females are typically larger than males. Their size is comparable to a large dog.
This article is reviewed by the Pagefacts team.
Editorial Approach:
This article explores how a giant South American rodent became an internet sensation, the bizarre Vatican ruling that classifies them as fish, and why their unusual friendliness with other species has captured global attention.
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