Here are animals who grabbed headlines this week

From polar bear cub Nanook making first appearance to stark picture of swan nesting amidst rubbish, here are animals who grabbed headlines. (Photos: AP)

Prairie dogs in southern Utah. Wildlife managers under the Trump administration are loosening contentious endangered-species protections for Utah prairie dogs in a plan that's worrying for animal advocates but cheered by people in southern Utah who said their town was overrun.

A large bison blocks traffic in the Lamar Valley of Yellowstone National Park as tourists take photos of the animal. America’s national parks are brimming with natural wonders: cascading waterfalls, towering redwoods, white sand beaches. But access to these gems can cost money, and it may soon get even pricier: The National Park Service has proposed raising entrance fees at many parks by $5.

Members of the Argentine Naval Prefecture and volunteers try in vain to rescue a stranded humpback whale in Mar del Plata, Argentina, Monday, April 9, 2018. The whale beached itself on Saturday afternoon and died on Monday.

A Canada lynx heads into the Rio Grande National Forest after being released near Creede, Colo. University of New Hampshire scientists have discovered a previously undiagnosed parasite transmitted by ticks and a virus in the Canada lynx. The New Hampshire Veterinary Diagnostic Laboratory uncovered the findings during a recent research study.

A bear performs before a Russian Second League soccer match between Angusht Nazran and Mashuk-KMV in Pyatigorsk, Russia on Sunday, April 15, 2018. The stunt, which has been condemned by animal rights groups, happened ahead of last Sunday's Russian Second League soccer match in the city of Pyatigorsk.

Two Syrian brown bear cubs play in their enclosure at the zoo of Servion, Switzerland, Tuesday, April 17, 2018. Three bear cubs were born on Jan. 19, 2018.

A swan tends to a nest, in a lake near Queen Louise's Bridge in central Copenhagen, Denmark, Tuesday, April 17, 2018. The nest containing several eggs is partially made of rubbish found in the lake.

An orca whale hunts sea lion pups on a beach at Punta Norte, Valdes Peninsula, Argentina. The orcas' predatory ritual occurs annually in the Southern Atlantic coast in March and April, coinciding with the development of the sea lions when the young cubs are learning to swim.