Christine Nasser and George, a Great Dane from Tucson, Arizona, who has been declared the world's tallest dog. Giant George is the new holder of the title, measuring 43 inches (109cm) from paw to shoulder and 7ft 3in (2.2m) from nose to tail
A greedy chipmunk crams a peanut into its mouth. The ravenous rodent has become a regular sight after plucking up the courage to be fed by hand at the house where she has set up home. Christian Stepien took thise hilarious picture in his mother's backyard in Mississauga, Ontario, Canada
A squirrel appears to be practising Tai Chi or Kung-Fu in a park in Moscow. The photographer said: "It was really bizarre. I was photographing the squirrel and it seemed to be making some really odd shapes with its front paws. It did look like it was doing martial arts. I think it had a small nut and was struggling to get to grips with it."
Mischievous squirrel monkeys appear to be enjoying the free transport as they ride around on the back of a capybara. The monkeys' antics were captured by photographer Sandra Astra at Hilvarenbeek Safari Park in the Netherlands.
A baby monkey named Miwa hangs on to a baby boar named Uribo while they run around in the Fukuchiyama City Zoo, Kyoto
A lazy monkey hitches a ride to the top of a tree - sitting on the back of a parrot. The squirrel monkey hopped onto the bird and wrapped his arms around its neck to avoid the 26ft climb. He lives with a male and female blue and gold macaw at a countryside hotel, where they always eat and play together. Photographer Alejandro Jaramillo was in San Agustin, Colombia, when he noticed the unusual friendship
A bison bull and a black-tailed prairie dog come face to face in Wichita Mountains Wildlife Refuge, Comanche County, Oklahoma
A goat with a monkey on its back does a tightrope-walking act at a zoo in Fuzhou, Fujian province, China