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Cotswold Wildlife Park celebrates UK’s only Wolverine births this year


Cotswold Wildlife Park celebrates UK’s only Wolverine births this year

Cotswold Wildlife Park is home to three new Wolverine kits. After spending approximately nine weeks hidden away in their underground den, the triplets are beginning to venture out and explore their new woodland enclosure under the watchful eye of parents Sarka and Sharapova.

The Park made history in 2012 as the first collection in the UK to successfully breed Wolverines (Gulo gulo) in captivity. These new arrivals are Sarka and Sharapova’s third litter and are testament to the Park’s excellent European Endangered Species Programme (EEP). Breeding is notoriously difficult with this species, so the youngsters are encouraging news for future generations. The triplets are the only Wolverine births in the UK this year - with just five other European zoological collections having successfully bred this species in 2018 (the breeding season is now over).

Keepers were unsure exactly how many kits had been born until mother Sharapova (pictured right) started bringing the youngsters out of the den. Jamie Craig, Curator of Cotswold Wildlife Park and member of the EEP committee for Wolverines, commented: “Once the female enters her den, we are pretty confident that the kits have arrived. She is an excellent mother, only leaving the kits for very brief periods to eat and drink. Once the kits are old enough, she will allow them out to investigate their surroundings but always under her vigilant eye. We were delighted to be the first UK collection to breed this species and, in many ways, it is even more rewarding to repeat our success for a third time.”
Females have a reproductive strategy known as embryonic diapause or delayed implantation. The embryo does not immediately implant in the uterus, but is maintained in a state of dormancy which allows pregnant females to fine-tune births and wait for the best possible conditions. Reproduction is hugely energetically expensive for any animal. If the environmental conditions aren’t able to support a female through the intense periods of pregnancy and nursing, it makes little sense to put energy into giving birth to young that may not survive. Diapause can last up to ten months in Wolverines. In the wild, when females are ready to give birth, they excavate long, complex snow tunnels for reproduction dens. They give birth to kits and shelter them from predation and harsh weather until weaning time. Newborns are altricial and covered in white fur with a pungent waxy substance on their pelage. This acts as a great defence against predators while the kits are vulnerable. Males do not assist in the rearing of young.

Recent studies have yielded important new insights into the nature of the Wolverine’s ecological niche. Unfortunately, these findings don’t bode well for the species’ future as the planet – and particularly the Arctic – continues to warm. Wolverine researcher K.  B. Aubry* warned: “The Wolverine may be second only to the Polar Bear in its sensitivity to global warming”. In America, this species once roamed across the northern tier of the United States and as far south as New Mexico in the Rockies. They are facing local extinction due to climate change and habitat loss. Approximately 300 individuals are believed to exist in the lower 48 states of America. In 2016, after a 20-year battle to protect these reclusive animals, the United States District Court for Montana finally granted the Wolverine the designation of a threatened species. 


Explore Gloucestershire
19 June 2018


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