Despite being legal, people are outraged American woman killed black giraffe in South Africa

Five animal rights groups filed a petition with the U.S. Fish and Wildlife Service to change the animals' status to "endangered."

Photos of an American hunter posing with the dead body of a "rare" black giraffe she had just killed during a hunt in South Africa have sparked outrage.

The pictures emerged after they were posted on Twitter by the South Africa-based AfricLand Post website. Accompanying the post, which shows two pictures of Tess Thompson Talley of Kentucky, were the words: "White american savage who is partly a neanderthal comes to Africa and shoot down a very rare black giraffe courtesy of South Africa stupidity. Her name is Tess Thompson Talley. Please share."

American animal lovers also expressed horror.

"I'm sick with rage," said a Twitter user identified as Tom Kay. "This waste of life #TessThompsonTalley is hunting beautiful creatures for a laugh."

Another tweeter, identified as Jessica Worley, urged people to "name and shame this grotesque excuse for a human being."

The photos were from a hunting trip Thompson Talley took in June 2017. "Prayers for my once in a lifetime dream hunt came true today!" she said in a Facebook post, apparently now deleted. "Spotted this rare black giraffe bull and stalked him for quite awhile. I knew it was the one. He was over 18 years old, 4,000 lbs and was blessed to be able to get 2,000 lbs of meat from him."

In 2015, protesters gathered outside the office and home of Minnesota dentist Walter Palmer after he killed a beloved lion, Cecil, near a national park in Zimbabwe.

Thompson Talley defended her kill in an email to Fox News: "The giraffe I hunted was the South African sub-species of giraffe. The numbers of this sub-species is actually increasing due, in part, to hunters and conservation efforts paid for in large part by big game hunting. The breed is not rare in any way other than it was very old. Giraffes get darker with age."

Trophy hunting is a legal practice in a number of African countries, Fox reported, including South Africa, Namibia, Zambia and Zimbabwe. In South Africa, where animals such as buffalo, elephants and lions are often targeted, trophy hunting is a $2 billion-per-year industry, the BBC reported.

Thompson Talley also told Fox the giraffe she killed was too old to breed and had killed three younger bulls who were able to breed.

"This is called conservation through game management," she said.

However, comedian, actor and animal activist Ricky Gervais  tweeted that "Giraffes are now on the 'red list' of endangerment due to a 40% decline over the last 25 years. They could become extinct. Gone forever." He criticized Thompson Talley, calling her spoiled, and anyone else hunting giraffes.

Actress Debra Messing also did not hold back. "Tess Thompson Talley from Nippa, Kentucky is a disgusting, vile, amoral, heartless, selfish murderer," she raged.