Many male animals have strong parental impulses, too. Take, for instance, this wild long-tailed macaque monkey in Bali, Indonesia. He stunned animal lovers around the world when he adopted an abandoned kitten and cared for it as his own. The monkey was spotted in a forest protectively nuzzling and grooming the ginger kitten, making sure no harm came to it. The extraordinary sight was captured by amateur photographer Anne Young while on a holiday to the Monkey Forest Park in Bali's Ubud region. (Photo by Anne Young/SolentNews.co.uk)

Tita, a cat who belongs to Ruben Gaviria, breastfeeds a squirrel as her kitten plays with it at Gaviria's house near Medellin, Colombia. Gaviria rescued the squirrel after it was found injured in a park in February 2010. (Photo by Albeiro Lopera/Reuters)

Laska the Alsatian immediately viewed it as her mission to nurture two tiny, abandoned wild boars who were close to death when they were found in Hamburg, Germany in March 2010. The baby boars – dubbed Alice and Emma – were brought to the home of the Heckers, Laska's owners. Because of their small size, baby boars can't stay warm enough alone at night to keep alive. Laska focused on snuggling up against them to keep them warm, cleaning them with her tongue and picking them up whenever they toppled over. (Photo by Barcroft/Fame Pictures)

Koko the gorilla has loved cuddling and nurturing kittens since 1984. Gorilla Foundation volunteer Janis Turner arranged to have a litter of orphaned kittens visit Koko in September 2009, and Koko became especially enamored with a tiny orange kitten named Tigger, pictured here. (Photo by Ron Cohn/The Gorilla Foundation/Koko.org)

Chia, a Pomeranian in Emporia, Kan., let four abandoned kittens nurse from her in August 2000. Chia, who had a 2-week-old puppy of her own at the time, adopted the motherless kittens after they were found by her owner's boyfriend. (Photo by David Doemland/AP)

Katjinga, a Rhodesian ridgeback dog who lives on a 20-acre farm in Germany, adopted an abandoned pot-bellied piglet in August 2009. The tiny black piglet, named Paulinchen, had been so small at birth that her mother likely overlooked it. Katjinga's owner, Roland Adam, found the piglet alone and cold and brought it to his 8-year-old dog. (Photo by Fame Pictures)

When the tree these baby squirrels called home was felled by a chain saw, Pixie the poodle was there to help. Pixie still had milk after giving birth to her first litter of puppies a few months earlier, and she accepted the three squirrels with no qualms in March 2010. She nursed the homeless squirrels for five weeks at her North Carolina home, and then an animal rehabilitation specialist continued raising them until they were ready to be released. (Photo by Ashley Steven Ayscue/The Daily Dispatch via AP)

Isabella, a golden retriever in Kansas who adopted three white Bengal tiger cubs and nursed them as her own. The tiger cubs – Nasira, Anjika and Sidani – needed somewhere to turn because their mother stopped nursing them 15 hours after their birth. Zookeepers Tom and Allie Harvey brought the cubs home, and their dog Isabella stepped right up. (Photo by Tom Harvey and Keith Philpott)

The young elk pictured here was rescued from a flooding river by a farmer in South Korea in July 2009. This female dog eagerly adopted the elk and began breastfeeding and guarding him. (Photo by Inje Municipal Government/Hand/EPA)

Three baby pigs rest next to their adoptive mother, Sai Mai, an 8-year-old tiger, at the Sriracha Tiger Zoo in Thailand in January 2010. Sai Mai nurses and cares for the piglets as if they were her own. (Photo by Sukree Sukplang/Reuters)