GILBERT, Ariz. - The breed of horses featured in Budweiser commercials is at risk of extinction.

Clydesdale horses are listed as a "vulnerable"  species, according to the Rare Breeds Survival Trust Watchlist for 2016.

A nonprofit organization in Gilbert, Arizona, is hoping to save the gentle giants. The USA Clydesdale Preservation Foundation hopes to reintroduce the breed as one good for riding, not just hitching and pulling plows or wagons.

Related: Welcome to Warm Springs Ranch, home of the Budweiser Clydesdales

USACPF says that by best estimates, there are only 5,000 Clydesdales left in the world. There were 140,000 in Scotland alone at peak population of the breed. The breed originated in Scotland.

USACPF cares for horses that worked in equine therapy. Now the horses visit schools and are featured in outreach events.

History

The famous Budweiser Clydesdales captured the hearts of Americans in 1933. A hitching team took a promotional tour of post-Prohibition United States, even delivering a case of beer to President Franklin Delano Roosevelt at the White House.

Photos: Budweiser Clydesdales deliver beer on Opening Day

The Budweiser Clydesdales are based at Warm Springs Ranch in Missouri. While Arizona was in the national spotlight hosting the Super Bowl in Feb. 2015, the ranch welcomed a foal just minutes before the Budweiser's "Lost Dog" commercial aired during Super Bowl XLIX. The foal was aptly named "Arizona."

WATCHBudweiser's best Super Bowl commercials of all time

How to help

USACPF accepts groups for barn visits, takes volunteers, and accepts monetary donations on its website.

You can set up your Amazon account with Amazon Smile, and select USA Clydesdale Preservation Foundation as the beneficiary. Every time you shop at smile.amazon.com, 0.5 percent of the purchase price of your items is donated to your charity on your behalf.

You can also buy a bottle of wine that benefits the USACPF.

Watchlist

Here are some of the other horse breeds on the priority list from the Livestock Conservancy:

Critical (population less than 2,000)

American Cream

Caspian

Morgan - Traditional

Newfoundland Pony

Shire

Threatened (population less than 5,000)

Colonial Spanish

Dartmoor

Exmoor

Lipizzan

Watch (population less than 10,000)

Clydesdale

Fell Pony