This is the moment a moose suddenly charges at a national park visitor who got too close.

The footage was shared on social media by Colorado Parks and Wildlife (CPW) to warn visitors about the dangers of getting too close to large animals such as moose.

The incident was filmed in Clear Creek County in the US state of Colorado and was posted on Twitter on 8th August.

CPW accompanied the video with the message: “This video is an example of being too close to a bull moose and how quickly they can decide to charge on you.

“It is from Clear Creek County. The individual just by chance came upon the bull walking along a willow bottom heading towards a lake.

“Thankfully no injuries occurred. This person managed to get behind a tree and the moose hit that.”

On their website, CPW warns visitors that moose are very protective of their territory and young.

Since 2013, CPW has received reports of at least 15 moose attacks resulting in minor to serious injuries to visitors.

In all but two cases, accompanying dogs were considered the cause of provoking the attack.

On their website, CPW says: “Moose have very few natural enemies in the wild and, as a result, do not fear humans as much as most other big game species. Moose tolerate humans longer and at closer distances.

“These formidable beasts need their space and must be given command and respect when observed in the wild.

“Signs of moose aggression include laid back ears, raised hairs on the neck, and licking of the snout.

“Keep pets away, as moose can get quite aggressive around them. Be especially cautious when walking dogs.

“If a moose displays aggressive behaviour or begins to charge, run as fast as you can and try to put a large object between you such as a boulder, car or tree.

“Moose tracks are very large and often show dewclaws in snow or mud. Moose sounds are limited to grunting, with bulls being the most vocal during the mating season.

“Moose do not herd into large groups as do many species of big game, even in winter. They prefer to travel in small family groups or to remain secluded.

“Move slowly and not directly at them. Back off if they exhibit signs of aggression, such as the hair on their neck standing up, licking their snout, cocking their head, and rolling their eyes and ears back.

“Moose are excellent swimmers and very much at home in the water, which can be a good place to view them.”