Zookeepers are getting their first proper look at a koala joey who was born in May, but has only recently emerged from his mother's pouch.
Specialist staff from China arrived over the weekend and incubators are ready for what will be the first giant panda baby born in the UK.
Staff at Edinburgh Zoo went to great lengths in ensuring their new "panda-cam" was at its best in the run-up to mating season.
Zoo keepers in Edinburgh have seen a change in the hormone levels of the female panda Tian Tian, sparking hopes that she may come in to season for only the second time since arriving in Scotland.
Iain Valentine, Director of Giant Pandas said: "The greatly anticipated hormone crossover has now been spotted in Tian Tian our female giant panda - her oestrogen is rising and her progesterone level has fallen through the floor.
"Every individual panda is different so it is difficult to predict exactly when the panda breeding season will be.
"Based on last year we would expect her to come into season 11 days from crossover, however her strong behavioural changes do not rule out that it could be even sooner than this.
"We'll be continuing to watch her behaviour closely and continuing to hormone test her urine twice a day."
Earlier in the year Yang Guang had started to show signs that he was ready to mate sparking hopes that Edinburgh Zoo could see some panda cubs in the future.
One of the UK's two giant pandas celebrated his ninth birthday today in Edinburgh Zoo.
Yang Guang tucked into a special cake in the shape of a panda head, as well some bamboo presents.
His birthday comes just ten day's before the UK's other giant panda, female Tian Tian, who will turn nine on August 24.
Tian Tian (Sweetie) and Yang Guang (Sunshine) are the first giant pandas to live in the UK for 17 years and Edinburgh Zoo will be their home for the next 10 years.
Britain's only pandas have run out of time to mate as their limited breeding season drew to a close.
Tian Tian and Yang Guang had a window of just 36 hours to mate and despite "natural sparks" flying between them, the pair did not do the deed.
Keepers at Edinburgh Zoo hoped for one final chance to put them together today but test results late last night showed a drop in the female bear's hormone levels.
They met five times on Tuesday and several times again yesterday and had shown signs of attraction to each other. However, the zoo said the level of interest had passed and limited breeding behaviour was seen in both pandas this morning.
Britain's only pandas have just one more chance to breed successfully, as time runs out.
On Wednesday "natural sparks" flew between Yang Guang and Tian Tian, but the pair failed to mate, as the female bear's limited window of fertility draws to a close.
Keepers at Edinburgh Zoo opened a "love tunnel" between their enclosures after tests showed Tian Tian had ovulated.
They met five times on Tuesday and "several times" on Wednesday but failed to ignite the "spark".
The pandas will have a final chance to mate on Thursday but keepers are losing hope that Tian Tian will get pregnant this year.
– Edinburgh Zoo
The pandas met again twice this evening and on their first meeting came closer than ever before to mating. If Tian Tian’s hormones are still partially elevated, we may put Tian Tian and Yang Guang together for one last time early tomorrow morning.