Alberta’s self-image as world’s only rat-free region shattered by discovery of rat

For much than 7 decades, residents of Alberta person shared thing successful communal with Antarctica and the precocious Arctic: each locations are officially escaped of rats.

But connected Thursday the Canadian province’s estimation arsenic a firewall against rodent infestation took a deed erstwhile the municipality of Bowden announced the find of a dead rat and called connected the province’s “rat patrol” to investigate.

“If you’ve noticed rat droppings oregon immoderate signs of rats, delight interaction Rat Patrol Alberta truthful they tin travel up,” the municipality said successful a statement. “Please enactment alert and study immoderate sightings.”

Officials successful Bowden did not accidental wherever successful the municipality the rat was found.

But arsenic planetary temperatures increase, rat numbers have surged successful large cities. Over the past decade, rats accrued by 390% successful Washington DC, 300% successful San Francisco and 162% successful New York, according to researchers, who analysed nationalist sightings and infestation reports. Toronto, Canada’s largest city, is facing a “perfect rat storm”, with numbers up 186% successful the past 10 years.

Unlike different regions successful the satellite that person been overrun by the wily and adaptable municipality mammals, Alberta has actively fought rats from entering astatine all.

“Albertans person enjoyed surviving without the menace of rats since 1950 erstwhile the Rat Control Program was established,” the state says successful its rat guide.

It cites some the province’s unsocial geography, with upland ranges and boreal wood surrounding astir of Alberta, and the information that the Norway rat – “one of the astir destructive creatures known to man”, the state claims – cannot past successful immense earthy areas and cannot overwinter successful cultivated fields. The precise deficiency of the humans and their structures that rats request to past has fixed the state a accidental to ward disconnected infestation.

In the 1950s, suspecting rats mightiness effort to participate from the eastbound by mode of neighbouring Saskatchewan, Alberta officials created a “rat power zone” – a portion of onshore measuring 373 miles by 18 miles (600km by 30km) – to show incursions that ranges from Cold Lake successful the northbound to the Montana borderline successful the south.

In addition, from June 1952 to July 1953, 140,000lb of 73% arsenic trioxide pulverization was utilized to dainty 8,000 buildings connected 2,700 farms to dilatory the dispersed of rats.

The state besides amended the Agricultural Pests Act of Alberta successful 1950, obliging “every idiosyncratic and municipality” to destruct rats they found; made posters reminiscent of a nationalist warfare effort; and hosted a vigor show, Call of the Land, to amended residents.

Today, determination are dedicated telephone lines and an email code to study rats.

But portion the rat patrol receives hundreds of calls each year, it says the immense bulk are not rats but muskrats, voles and tract mice.

Still, it concedes determination are exceptions. “Alberta’s rat-free presumption means determination is nary nonmigratory colonisation of rats and they are not allowed to found themselves. It does not mean we ne'er get rats.”