If you missed last week's animal photos, be sure to check out these images of endangered tigers. Animal Photos of the Week is back with images of wild, cuddly and majestic animals taken in the past two weeks.

As you're thinking about your mom on this Mother's Day, click here to read about animals' parenting styles and learn whether a ruffed lemur or a harp seal makes a better mama.

In animal news, OR-7, the lone wolf that has roamed for hundreds of miles through Oregon and Northern California, was spotted in California this week. Possibly looking for a mate, OR-7 is the first and only gray wolf in California in over 80 years, reported the Associated Press.

The results of a recent U.S. Navy study show that naval sonar and explosives use near California and Hawaii may be harming more marine life than previously thought. Zak Smith, staff attorney at the Natural Resources Defense Council, said the Navy was taking "positive steps" with a better understanding of the impact of sonar and explosives, according to AP.

Another recent animal study found that groups of wild chimpanzees appear to show cultural differences like humans. Studying 45 chimps from three groups, researchers noticed differences in their nut-cracking techniques. Researcher Christophe Boesch of the Max Planck Institute said in a statement, "In many ways, chimpanzees are very similar to us humans. By studying the similarities to our closest living relatives in their natural habitat in Africa, we have the unique opportunity to learn more about the evolutionary roots of culture, which is for us humans one of the key elements of our identity."

Below, check out some of the best animal photos from the past two weeks, including a few animal mothers and their offspring.

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  • In this handout photo provided by Skazka Zoo, taken May 6, 2012, a female white albino tiger, Tigryulia is seen with her newborn cub at the Skazka Zoo in Yalta, Ukraine. The tiger gave birth to four cubs, including a rare albino tiger. A beautiful white tigress was the symbol of Yulia Tymoshenko's presidential election campaign, representing her ferocious resolve. (AP Photo/Skazka Zoo)

  • LAKE BUENA VISTA, FL - MAY 07: In this handout image provided by Disney Parks, Kendi, a 13-year-old female white rhino, tends to her new male calf at Disney's Animal Kingdom at Walt Disney World May 7, 2012 in Lake Buena Vista, Florida. The yet-unnamed calf was born May 4 after a 16-month gestation period. It is the ninth white rhino born at Disney's Animal Kingdom, with Kendi being the first. (Photo by Gene Duncan/Disney Parks via Getty Images)

  • A male African cheetah name Dark is released at his enclosure at the Nehru Zoological Park in Hyderabad on May 12, 2012 .Three Cheetahs from the Dvur Kralove Zoo in the Czech Republic were brought to Hyderabad as the new addition to the Zoological park under an animal exchange programme. AFP PHOTO / Noah SEELAM

  • A ring-tailed lemur and her two cubs discover the enclosure at the zoo in Marlow, eastern Germany, on May 10, 2012. AFP PHOTO / BERND WUSTNECK

  • An Asiatic elephant baby tries to stand up next to its mother in their enclosure in Berlin, on May 10, 2012. The young elephant was born on May 8, 2012 und is not given a name yet. AFP PHOTO / STEPHANIE PILICK

  • PONTE VEDRA BEACH, FL - MAY 12: A heron is seen in the pond on the 12th hole during the third round of THE PLAYERS Championship held at THE PLAYERS Stadium course at TPC Sawgrass on May 12, 2012 in Ponte Vedra Beach, Florida. (Photo by Mike Ehrmann/Getty Images)

  • In this May 6, 2012 photo provided by the Chicago Zoological Society, two of 11 common chuckwallas that hatched March 23 at Brookfield Zoo in Brookfield, Ill., climb atop their mother. The Chicago Zoological Society, which manages the zoo, has had success in breeding this particular species of chuckwalla, which is found in the southwestern United States. The zoo taff plans to use their expertise in husbandry of this species to breed San Esteban chuckwallas, a more endangered chuckwalla species, in the future. (AP Photo/Chicago Zoological Society, Jim Schulz)

  • This picture shows squirrels in Lodi garden on April 17, 2012 in Old Delhi. AFP PHOTO / GABRIEL BOUYS

  • Two little Golden Lion Tamarin hang on their father at the zoo in Duisburg, Germany, Thursday, May 3, 2012. The small twins were born only six weeks ago. (AP Photo/Martin Meissner)

  • WEYMOUTH, ENGLAND - MAY 11: Recently hatched cygnets walk beside the waters edge at Abbotsbury Swannery - the only publically accessible colony of nesting mute swans in the world - on May 11, 2012 near Weymouth, England. The arrival of the cygnets is traditionally seen as the start of summer and local traditions claim the Benedictine Monks who owned the Dorset swannery between 1000 AD and the 1540s believed the first cygnet signalled the season's first day. Abbotsbury Swannery's mute swans - up to 1,000 in total - are all free flying, and are not kept in cages. (Photo by Matt Cardy/Getty Images)

  • A white Bengal tiger reacts at his enclosure in the Nehru Zoological Park in Hyderabad on May 12, 2012. AFP PHOTO / Noah SEELAM

  • A three-month-old kangaroo named Anabelle and a young Kea check out the enclosure at the zoo in Marlow, eastern Germany, on May 10, 2012. AFP PHOTO / BERND WUSTNECK

  • 'Bandit' watches Dog TV May 10, 2012 in Washington, DC. Dog TV says it's 'the first television channel for dogs,' with 'scientifically developed' 24/7 programming full of frisky hounds running leashless in lush green fields to soothing strains of meditative music. Dog TV premiered in April on two cable networks in San Diego, California, where Uzrad said the take-up has been 'really much more than we predicted.' Its Israeli producers, Jasmine Television, hope to see Dog TV on cable systems elsewhere in the United States and abroad in the coming months. Don't have cable? It's also available as streaming video for $9.99 a month, along with apps for the usual smartphones and tablets. AFP PHOTO/Brendan SMIALOWSKI

  • BERLIN, GERMANY - MAY 10: A baby Asian elephant, born only two days before, slips on his wobbly legs and gets support from his mother Nova in his enclosure at Tierpark Berlin zoo on May 10, 2012 in Berlin, Germany. The male elephant calf, who does not have a name yet, weighs 102kg and is 91cm tall. (Photo by Sean Gallup/Getty Images)

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    PONTE VEDRA BEACH, FL - MAY 09: A dragonfly is seen during a practice round prior to the start of THE PLAYERS Championship held at THE PLAYERS Stadium course at TPC Sawgrass on May 9, 2012 in Ponte Vedra Beach, Florida. (Photo by Sam Greenwood/Getty Images)

  • In this May 8, 2012, photo, "For Heaven's Sake" animal rescue operator Claudia Claudia Supensky holds a trio of baby opossums that are being cared for at the sanctuary near Rochester, Wash. (AP Photo/The Olympian, Steve Bloom)

  • An ostrich (Struthio camelus) stands in his enclosure in the zoo in Berlin, Friday May 11, 2012. (AP Photo/dapd/Andreas ProstB

  • A white tiger cub is nursed from a bottle by a Zoo worker in the Ukraine's biggest zoo in the Black Sea resort city Yalta, Friday, May 11, 2012. A beautiful white tiger that became a symbol of Yulia Tymoshenko's presidential campaign has returned to the spotlight by giving birth to four cubs, including a rare albino one. Tigryulia, a 3-year-old white Bengal tiger successfully delivered the cubs, but has been reluctant to nurse them, apparently distracted by zoo visitors and her partner, a 6-year-old tiger from France named Patrice. (AP Photo/ Andrew Lubimov)

  • In this handout photo provided by Skazka Zoo, taken May 6, 2012, a female white albino tiger, Tigrylia is seen with her newborn cub at the Skazka Zoo in Yalta, Ukraine. Tiger gave birth to four cubs, including a rare albino tiger. A beautiful white tigress was the symbol of Yulia Tymoshenko's presidential election campaign, representing her ferocious resolve. (AP Photo/Skazka Zoo)

  • A yet unnamed male Asian elephant baby (Elephas maximus) stands next to his mother Nova, left, at the Tierpark Zoo in Berlin Thursday May 10, 2012. The baby was born Tuesday May 8. (AP Photo/dapd/Timur Emek)

  • A white-faced saki (pithecia pithecia) feeds in its compound in the zoo of Nuremberg, southern Germany, Tuesday, May 8, 2012. (AP Photo/dapd, Timm Schamberger)

  • A little Golden Lion Tamarin watches visitors at the zoo in Duisburg, Germany, Thursday, May 3, 2012. Two tlittle lion apes were born only six weeks ago. (AP Photo/Martin Meissner)

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