A B.C. coalition of more than 50 nature groups wants cat owners to leash their pets and wants the province’s municipalities to require licences for felines.

BC Nature president John Neville says other cities such as Toronto, Edmonton and Calgary require cats to be licensed.

"It's a slowly growing movement, that process so that the cats are under control and the diminishing wildlife is being protected,” Neville told CBC News.

A new study shows cats are responsible for many more animal deaths each year than previously believed, killing as many as 3.7 billion birds and up to 20 billion mammals in the U.S. alone.

Most of the cats responsible are strays, but according to the report, domestic felines are still responsible for billions of deaths.

Neville said he would like to see strict rules go along with the licensing.

"You would have to let it out either in a run, or take it out on a leash or keep it totally indoors.”

In May 2011, BC Nature forwarded a resolution to the Union of B.C. Municipalities, urging them to adopt mandatory cat licences.

“We brought it to the attention of the UBCM, we've written to municipalities around the province, we've drawn attention to the fact that other cities around Canada are now requiring licensing,” Neville said.

But Neville said as far as he knows, there are still no municipalities in the province that now have cat licensing bylaws.

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  • Milly, a 13-week-old kitten waits with her brother Charlie (L) to be re-homed at The Society for Abandoned Animals Sanctuary in Sale, Manchester which is facing an urgent cash crisis and possible closure on July 27, 2010 in Manchester, England. (Photo by Christopher Furlong/Getty Images)

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  • Blondie, a bichon dog, looks at her adopted ten day old kitten, Yako, which was found in a rubbish bin, in Rabat 24 April 2001. Although the dog has had no pups of her own, she has no trouble feeding the kitten. (A DA/AFP/Getty Images)

  • A kitten is pictured on December 5, 2009 during a cat exibition in Moscow. (NATALIA KOLESNIKOVA/AFP/Getty Images)

  • A stray kitten is posed for a photograph at Battersea Dogs and Cats Home on August 18, 2009 in London, England. Battersea Dogs and Cats Home is seeing a sharp rise in the number of cats requiring a home with 143 of the 145 shelter's pens full. (Photo by Dan Kitwood/Getty Images)

  • A cat and her kitten play with a squirrel, which was rescued off the streets, in Envigado, Antioquia Department, Colombia, on February 16, 2010. (RAUL ARBOLEDA/AFP/Getty Images)

  • Kittens are pictured in a bucket, before the arrival of Britain's Camilla, the Duchess of Cornwall, at Battersea Dogs and Cats Home, in London on October 27, 2010. The Duchess opened the new cattery during her visit to the animal refuge, which is celebrating it's 150th anniversary this year. (Chris Jackson/AFP/Getty Images)

  • A volunteer displays a newly-born cat delivered by a rescued stray cat at the home of cat lover Duo Zirong on July 10, 2007 in Shanghai, China. (Photo by China Photos/Getty Images)

  • Two less than a week old kittens of a jungle cat (lebis Chaus) lie inside the forest department office in Mumbai, 11 June 2007. Three abondoned kittens, found in the jungles of Aarey milk colony, on the outskirts of the city, were later handed over to the forest authorities, likely to be released in the Borivali national park in Mumbai. (PAL PILLAI/AFP/Getty Images)

  • Boggles, a stray kitten, one of the lucky animals at the Barnes Hill RSPCA Animal Rescue Centre, has found a caring home on 4 April 2007, Birmingham, England. (Photo by Christopher Furlong/Getty Images)

  • Milly, a 13-week-old kitten looks through the glass of her pen as she waits to be re-homed at The Society for Abandoned Animals Sanctuary in Sale, Manchester, which is facing an urgent cash crisis and possible closure on July 27, 2010 in Manchester, England. (Photo by Christopher Furlong/Getty Images)