The staff at the Edinburgh Zoo has been warned not to wear high visibility jackets around their two giant pandas, just in case it keeps them away from sex.
The Scottish Zoo has implemented a ban on any potentially distracting outfit because it could disrupt a romantic moment between Tian Tian (Sweetie) and Yang Guang (Sunshine).
The giant pandas are on loan from the Giant Panda Bifengxia Base in China until 2021, but they still have to produce a puppy.
The staff at the Edinburgh Zoo can not wear high visibility jackets around their giant pandas Tian Tian (pictured) and Yang Guang
The zoo has also banned the use of noisy leaf blowers near the couple for fear of interrupting a romantic moment.
Sweetie was artificially inseminated last year but could not reach the full term, while Sunshine has been shown to be "not receptive to natural mating".
The Edinburgh Zoo, which is the only one in the UK that houses giant pandas, has also banned the use of leaf blowers near the pair.
The Royal Zoological Society of Scotland, which operates the Edinburgh Zoo, told the Sunday Times: "Animals can be sensitive to noise, vibration and anything visual that may be out of the ordinary, such as high-visibility clothing."
Sweetie and Sunshine moved to the Scottish Zoo in 2011 with a 10-year loan from China.
The couple, who were the first to set foot in the United Kingdom for 17 years, cost £ 640,000 per year and have yet to produce any puppies.
The giant pandas are on loan from the Giant Panda Bifengxia Base in China until 2021 (pictured, Yang Guang in 2013)
Sweetie successfully gave birth to the twins Shen Wei and Bo Si just a year before the couple arrived at the Edinburgh Zoo.
The zoo began artificially inseminating Sweetie in 2013, when she became pregnant, but it is believed that she reabsorbed the fetus in late pregnancy.
A second and third insemination took place in the following years, but once again it proved unsuccessful.
The movement to reduce noise around the pandas comes after it was announced in March that Sweetie and Sunshine will not attempt to reproduce this year.
Zoo officials told the BBC they wanted to make "some improvements to our giant panda enclosure" before attempting future breeding.
A spokeswoman for the Edinburgh Zoo said: "We will not try to breed our giant pandas this year because we want to continue to evaluate the incredibly complex and unpredictable breeding process.
"This break, which has the support of our giant panda team and other key specialists, will allow us more time to consider the scientific data, our own experiences and those of colleagues around the world, including the latest ideas on hosting giant pandas. "
What are giant pandas? Six facts you should know about fascinating animals
The four-month-old giant baby panda Xiang Xiang appears in the photo receiving a physical examination at the Ueno Zoo in Tokyo on October 10, 2017
- There are currently around 1,600 giant pandas that live in the wild and 300 in zoos and breeding centers around the world.
- He is not sure how long the Giant Pandas could live in nature. However, the oldest zoo panda has so far turned 38 years old.
- The diet of a wild panda is 99 percent bamboo. The remaining one percent is often small rodents.
- Giant pandas need to consume around 20 to 40 pounds of bamboo every day to get the nutrients they need.
- On all four legs, giant pandas are about three to four feet tall.
- Puppies do not open their eyes until they are between six and eight weeks old and are not mobile until they are three months old.