This cheeky macaque gets up close and personal as he examines the dental hygiene of his fellow primate. Using his fingers to prise open his friend's mouth, he carefully inspects his teeth, searching for any unwanted visitors. The hilarious photographs were captured by British photographer David Williams, 41, on a visit to Tama Zoo, in Hino, Japan. David, from Bangor, Wales, says: “In these pictures you can see a macaque looking inside a friend's mouth, searching for fleas or insects.
PERCHED on a branch, this Little Owl plays third wheel to two love birds .
A blanket of fog is lit up by the colourful glowing lights of the city below .
ROLLING across a 65-metre-high viaduct in the Alps, the red carriages of the Bernina Express add a splash of colour to the spectacular snow-covered Swiss surroundings .
POWERFUL bolts of lightning illuminate the night sky in an incredible autumn storm over the Sardinian coastline .
A group of shelter dogs showcase their loveable personalities in a series of passport-style photographs - in the hope of finding their forever homes .
An Indonesian farmer is dragged through muddy water as he clings to the tails of two charging cows .
Swirling water and sand create amazing aerial images of river deltas across Iceland .
It's incredible to think anyone could live in such horrendous squalor - yet two men have been prosecuted for keeping their homes in such revolting conditions that it was no longer fit for their animals .
BLOWING bubbles underwater, this adorable polar bear slides into his tank for a playful dip .
With blue waves tumbling over them, these surfers glide underneath a tunnel of water .
NEW DELHI, A woman activist of India's main opposition Bharatiya Janata Party crosses a police barricade near the residence of ruling Congress party chief Sonia Gandhi during a protest against the recent rape of a five-year-old girl in New Delhi, India, April 21, 2013 .
Splashing around in the water, a mother otter and her son are tangled in a family feud .