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.
PERCHING on the edge of a flower, these loved-up caterpillars can't resist each other as they enjoy a romantic moment together .
A Romanian photographer has captured the unique patterns of hundreds of human eyes in a series of striking macro shots .
A lively lemon shark grins into the camera and showcases his impressive teeth .
SHOWING off her best assets for the camera, this cheeky orangutan is in the mood for love, puckering up her lips to blow the biggest kiss she can .
With an abandoned tricycle sitting in an empty corridor, this derelict but once grand mansion could be the setting for The Shining .
HOPPING onto the scales, these adorable baby Humboldt penguins are ready for their first weigh-in .
PUCKERING up and enjoying some quality time, these are the most lovable monkeys on the planet .
A diver explores the crystal clear waters of the Silfra canyon in southern Iceland, which is the only place on Earth where you can dive or snorkel between two continental plates .
PAWS for thought as you feast your eyes on this rare bear bathing session .
A middle spotted woodpecker swoops into her nest and feeds her young in a forest in Trentino, Italy .
A photographer has travelled the length of the UK capturing lighthouses and their picturesque surroundings .