1. Missouri River. Nicknamed “Big Muddy,” the Missouri River is the longest river in the US. It has a whopping length of 2,341 miles and has over 95 significant tributaries, some of which are Platte River, Kansas River, Milk River, Yellowstone River and, James River.

Table

UNITED STATES

• Missouri: 2,540 miles.
• Mississippi: 2,340 miles.
• Yukon: 1,980 miles.
• Rio Grande: 1,900 miles.
• St. Lawrence: 1,900 miles.
• Arkansas: 1,460 miles.
• Colorado: 1,450 miles.
• Atchafalaya: 1,420 miles.

Alaska

However, there are many partial state boundaries, particularly in the Midwest, Northeast, and South, that are defined by rivers; in fact, only five states (Colorado, Hawaii, Montana, Utah, and Wyoming) completely lack any borders defined by rivers or waterways.

Missouri River

Lake Nyos

Based on this, it’s probably safe to swim in those areas, but like any river with wild-life there are no guarantees. If you are worried about wildlife, not very dangerous. Swim with other people and from a boat rather than from shore. Biggest threat is probably drowning.

Sickness. Tourists are especially prone to sickness while traveling in the Amazon rainforest. According to Goparoo Travel Guide, the biggest threat comes from mosquitoes carrying malaria and yellow fever. These are both serious illnesses, so get the appropriate vaccinations before you go to the Amazon.

The Most Dangerous Animals Of The Amazon Rainforest

• Piranhas.
• Bullet Ant.
• Black Caiman.
• Electric Eel.
• Jaguar.
• Wandering Spiders. The wandering spider, found in the Amazon rainforest.
• Mosquito. Mosquitoes feed on human blood.
• Amazonian Giant Centipede. The creepy crawly appearance of the Amazonian Giant Centipede.

List

Top 5 Deadliest Predators of All Time

• Smilodon. Smilodon was a prehistoric cat that is often popularly referred to as the ‘sabre-toothed tiger’.
• Anomalocaris.
• Tyrannosaurus Rex.
• Liopleurodon.
• Homo Sapiens.

Canines

The capybara is the friendliest animal in the world.

International Dog Day 2020: 6 most dangerous dog breeds in the world

• American Pit Bull Terrier. 1/6. American Pit Bulls are one of the most dangerous dogs and have been banned by many countries in the world.
• Rottweiler. 2/6.
• German Shepherd. 3/6.
• American Bulldog. 4/6.
• Bullmastiff. 5/6.
• Siberian Husky.

Here are ten dogs that were rated as the friendliest breeds in the world:

1. Coton de Tulear. Coton de Tulear is at the top of the friendliest breeds of dog.
2. Havanese.
3. Dachshunds.
4. Pugs.
5. Beagles.
6. Bichon Frise.
7. Golden Retrievers.
8. Poodles.