From: BBC Earth
Published September 3, 2011 11:20 AM

Title: Deadliest States of the USA / 5 ways to keep safe in the USA

Taking a risk by going on an adventure and exploring a new environment, is an essential part of understanding the natural world within which we live. But sometimes accidents occur. Usually completely unaware, humans put themselves at risk of being attacked or even worse - being eaten.
But how do you ascertain what is a potential threat and what is not? Know your enemy.

This fantastic rough guide to the nature you do not want to come face-to-face with (without an experienced leader of course) aims to provide you with some inside knowledge.

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Know your enemy!

The United States' huge size and vast biodiversity, make it one of a small group of countries that hold the impressive title of being megadiverse.
Harboring more than 91,000 insect, 500 reptile and amphibian, 750 bird and 400 mammal species, it is no surprise that the 3.6 million square miles (9.2 million km2) of land that make it the third largest country on the planet, is the site of some less than pleasant human-animal encounters.
Let's take a look at some of the toughest specimens the United States’ animal kingdom has to offer.

1. Texas - Rattlesnake

By both population and landmass, Texas is the second largest state in the USA. And it is because of this immense size of 261,797 square miles (696,200 km2), and wide-ranging terrain that this particular territory has grown an infamous reputation as the toughest, wildest and most dangerous of all 50 states - whether that's because of cowboys or rattlesnakes remains uncertain.

With a range of different climate types, from the sub-tropical swamps of the east to the desert-like conditions of the west. It is easy to understand how Texas has become such a challenge when it comes to regional classification, and why it's population of potentially dangerous creatures it so vast.

One of the most feared creatures of Texas is the rattlesnake. In particular the Western Diamondback whose bark is definitely as bad as its bite. The snake's advanced venom delivery system allows it to control the amount of venom discharged. Once the prey has been killed venom also plays a role in its digestion.
This western outlaw is definitely one to run rather than just hide from.

2. Florida - Alligator

Boasting the longest coastline in the continental United States, stretching approximately 2,276 miles (3,662 km), and home to one of the most famous national parks in the world - the Everglades. Florida's omnipresence of water has given the state its lifeblood as well as its greatest foe.
In the past decade southern Florida in particular has sadly become a feral orphanage for exotic pets such as the African rock and Burmese pythons. It is a native reptile, with over a million populace, that intimidates its human counterparts the most.

Notorious for its 75-toothed bone-breaking bites, this incredible creature has remained virtually unchanged in appearance for over 200 million years.
Attacks on humans are rare, perhaps because alligators do not associate humans with food. However, due to increased contact with people they are becoming habituated and this may lead to increased conflict. With increased human encroachment on the natural environment, the Southeastern United States will have to keep on their toes.

3. Arizona — Black Widow

As well known for its desert climate as for its lush pine forests and mountain ranges, Arizona's abundance of venomous creatures places it high on the list of the USA's deadliest states.

However few of the species who call this state home have venom strong enough to be life threatening to humans. One such exception however is the Black Widow spider. So called because the female has a reputation for eating the male after mating - in fact this is rare in nature.

Like the alligators of Florida, they are rarely aggressive unless provoked, or mishandled. The venom is classed as neuro-toxic because it affects the nervous system and can cause respiratory distress and chest pain. Bites are particularly dangerous in children due to their small size and to pregnant women who can be induced to go into premature labour.

4. Alaska — Bear or moose?

As the largest state in the US with a land area over twice the size of Texas, with more than three million lakes and some 28,000square miles (74,600 square km) of glacial ice cover. Alaska really is the cooler cousin of all the territories. The perfect habitat for an animal that by tradition, takes first place as most feared - the bear.

But it is not just the top predators we humans should fear but in some cases their prey too. The moose, a favored prey of the bear, poses a big threat to humans.  With males weighing in at around 1,600lb (725 kg), these heavyweights although not aggressive unless provoked or startled, injure more people every year in Alaska than bears do. Due to their vast population, moose-human interactions are frequent. Increased urbanized areas with high-speed roadways means that vehicle-moose collisions are now the most frequent cause of moose-related injury. Although they most commonly bluff charge as opposed to actually charging it is better not to wait around to check if it was a mock one or not - retreat behind something solid.

5. California — Mountain Lion

This has always been an incredibly prosperous region for agriculture, and since the famous gold rush of the 1800's it has been known as the Golden State, so-called for its financial prosperity. California is by far the most populous state in the US with over 12% of the population living there. However the idyllic region is not without its problems.

Located within the Pacific Ring of Fire California is subjected to a phenomenal amount of earthquakes, with the south of the state averaging 10,000 per year. This causes some freak meteorological effects, including tsunamis. In spite of this, California contains more forestland than any other continental state and can lay claim to having some of the tallest, largest and oldest trees in the world. Making it a perfect habitat for one of the oldest predators in the country - the mountain lion.

Once used to roaming almost the whole of the United States, today these remarkably adaptable cats are still found across most of California. Also known as cougar, panther or puma, these large solitary predators still have the biggest range of any large terrestrial mammal in the western hemisphere.

Although incredibly shy and preferably remaining out of sight, recent reports have shown an increase in the number of human encounters with mountain lions. This is down to an increase in the large cats' population and because more and more humans are encroaching on their territory.
If you do come face-to-face with a cougar give it room to get away, it would rather avoid you than confront you - and I am sure the feeling is mutual.

To see more incredible photos and video, link to BBC Earth.

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