London Zoo has been urged to review its events programme after concerns were raised about their impact on animal welfare.
Weighing in at at a tiny 37 grams when hatched, the first of the young crocodiles emerged from its egg in June.
London Zoo has had a surprise new addition in the form of their first ever baby sloth -but keepers didn't even know the parents had mated.
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.
– Zookeeper Angela Ryan
"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.
"After a carefully-managed introduction process, the two girls are getting along famously with the rest of the group," say zookeepers, "With dominant male Lucky taking a particular liking to Mo - who quite enjoys the flirty attention."
London Zoo's efforts to increase the tiny population of one of the world's rarest primates have been boosted with the arrival of two female mangabey monkeys.
Kasi and Mo were both born in Dublin Zoo. They've been moved to London as part of a European breeding programme.
Zookeeper Tony Cholerton explains why Jae Jae the Sumatran tiger needed a swimming lesson.
Tiger keeper Teague Stubbington said: "Jae Jae loves chilling out in the Tiger Territory pool - especially on hot days - but we really wanted him to make better use of it and encourage his natural swimming abilities.
"Not only is swimming fantastic exercise for Jae Jae, the anticipation of getting to the meat stimulates his natural predatory instincts - and catching his 'prey' is the best reward he can get!"