A stunning shot of a turtle gliding through the sea and the breathtaking image of an ant carrying a leaf ten times its size.
That's just two of the mesmerising pictures entered into the ZSL Animal Photography Prize now showing at London Zoo.
The competition is held every year to inspire amateur and professional photographers to get out and capture the magic of the natural world.
This wriggling Waxmonkey frog was among the species weighed at London Zoo today. He was 40g - a tenth of the size of the African Bullfrog.
Measuring Sumatran tiger Jae Jae was particularly trying for staff at London Zoo. They coaxed her to standing height with meat - managing to get a very brief measurement on their huge ruler. She came out at 6ft 6inches in her annual check-up.
How much does a camel weigh? And how do you get one onto the scales to find out? Here's a demonstration from the keepers at London Zoo, who are weighing all the animals as part of an annual survey.
Ghengis weighed 500g and Noemie 625kg. Keepers said both had lost weight after shedding their winter coats.
Attracting an anteater onto the scales is no easy feat, as keepers at London Zoo demonstrated today. Tammy the tamandua had to be coaxed with mealworms - with varying levels of success. She weighed in at 6.8kg - the same as a road bike.
Rebecca the Royal Python weighed in at 600g at today's London Zoo annual weigh-in. She took some convincing to stay still long enough to get the measurement though.
The measurements taken during London zoo's annual stock-take are used to monitor the animals' health and shared with zoos across the world to compare information on endangered species.
"Every year we like to weigh the animals we have at the zoo, really just for a record so we can share it with other zoos and even conservation projects abroad."Not everything can be weighed, but anything that we have that can be trained, from camels to birds, aadvarks to armadillos - even the tigers - we are trying to get weighed today."By being able to tell what they weigh, we can use that later on if they're not very well - if they've lost weight we know that they're sick, if they're pregnant their weights will go up, so throughout the year we can use it as a comparative."
Animals stepped on the scales at London Zoo today for the annual weigh-in. It allows the keepers to keep check of all their vital statistics and make sure they're all fit and healthy.
Waxy monkey frogs, giant African land snails and tamandua tree anteaters were among the creatures to take to the scales.
London Zoo is looking after some precious new arrivals tonight - two Mangabey Monkeys. Without the zoo's help the animals would become extinct. But as Sharon Thomas explains, a breeding programme and a little bit of patience - will help ensure their survival in the wild.
London Zoo has welcomed two new mangabey monkeys - which are among the most endangered primates in the world.
It's hoped the two females will boost the zoo's breeding programme, to sustain the population of this rare species.
Sharon Thomas reports.