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Posted by tzury 6 days ago

How Alberta Eradicated Rats(worksinprogress.co)
206 points | 136 commentspage 2
dang 6 days ago|
Related:

On the front lines of humanity’s high-tech, global war on rats (2015) - https://news.ycombinator.com/item?id=17821534 - Aug 2018 (1 comment)

On the front lines of humanity’s high-tech war on rats - https://news.ycombinator.com/item?id=9540096 - May 2015 (32 comments)

I thought there had been other threads about this but couldn't find them. Anyone?

NaOH 6 days ago|
New York claims a small victory in 'forever war on rats' - https://news.ycombinator.com/item?id=42918425 - Feb 2025 (204 comments)

Cats are no match for New York City's rats (2018) - https://news.ycombinator.com/item?id=38333054 - Nov 2023 (77 comments)

How rats became an inescapable part of city living - https://news.ycombinator.com/item?id=19413214 - Mar 2019 (52 comments)

The Case for Leaving City Rats Alone (2016) - https://news.ycombinator.com/item?id=19207172 - Feb 2019 (14 comments)

Drones Help Rid Galapagos Island of Invasive Rats - https://news.ycombinator.com/item?id=19078518 - Feb 2019 (58 comments)

New Zealand’s War on Rats (2017) - https://news.ycombinator.com/item?id=16891549 - April 2018 (34 comments)

New Zealand’s War on Rats Could Change the World - https://news.ycombinator.com/item?id=15730337 - Nov 2017 (3 comments)

BXLE_1-1-BitIs1 6 days ago||
Lots of rodents in Alberta. The neighbourhood cats keep the mice and hantavirus down. Aircraft are often infested with mice. We need more bullsnakes.
triceratops 6 days ago||
> The neighbourhood cats keep the mice and hantavirus down. Aircraft are often infested with mice

They aren't doing a good job of keeping them "down" if they're on planes.

cucumber3732842 6 days ago||
Airports have tons of food (grass environment + human garbage), tons of mouse habitat (grassy areas, outbuildings, machinery), and not many cats.
triceratops 5 days ago||
It was a joke. If mice are in aircraft they are "up" (in the air), not "down".
sellmesoap 6 days ago||
Time to flip the Samuel Jackson quote upside down, we need more mf'in snakes on the mf'in plane!
mekdoonggi 6 days ago||
I wonder if we stopped trying to eradicate coyotes we might have an easier time with rats. I personally would rather see a coyote than a rat.
WalterBright 6 days ago||
Around here the coyotes eat mice. I'll see a golf ball size blob of crushed bones and fur on the driveway now and then.

A few years ago, a coyote mom with her 5 pups set up shop on my front lawn. She'd keep a weather eye on me, and me on her, and we got along fine. Over the summer, the number of pups dwindled. I saw a severed head of one a ways away, I think it was done by an eagle. I think only 2 survived the summer.

I sometimes see 6 eagles at a time circling overhead. One flew by so close I could have touched its wingtip. Wow!

A bobcat lives nearby. I see his tracks in the snow, and saw him a couple times.

I live well within the Seattle metropolitan area. Isn't it amazing?

toast0 6 days ago||
Over across the sound, we get bald eagles stealing salmon off of people's grills :)
b112 6 days ago||
Nice try Bob. I know it's you, and I know you stole my salmon that one time.

Bald eagles indeed!

OptionOfT 6 days ago|||
This inevitably brings us to the story of the reintroduction of wolves in Yellowstone, and how they eat the deer which brings back a whole new slew of changes.
bragr 6 days ago||
Not to be downer, but recent studies have not corroborated those effects.

>One of the most celebrated claims about Yellowstone’s wolves is facing a major challenge. Scientists say the study behind the famous trophic cascade story relied on flawed methods that overstated the ecological impact of wolf recovery. Their reanalysis found no evidence for a dramatic, park-wide surge in willow growth. Instead, the effects appear smaller and vary from place to place.

https://www.sciencedaily.com/releases/2026/06/260613215510.h...

mekdoonggi 6 days ago||
Is there a word for a popular misconception that nonetheless produces a positive result? The understanding by the public of the effects could be completely wrong, but the reintroduction of wolves and the restoration of Yellowstone are still good things.
lovemenot 6 days ago||
propaganda?
gucci-on-fleek 6 days ago|||
There are tons of coyotes in Alberta, to the point where my very urban university has had to put up "Be Coyote Smart" signs since they keep showing up on campus. Nobody that I'm aware of is trying to eradicate coyotes here either, aside from the occasional farmer during calving season.
cmrdporcupine 6 days ago|||
Coyote populations are climbing, not shrinking.
mekdoonggi 6 days ago||
I know, which makes our attempts at killing them even dumber.
cmrdporcupine 6 days ago|||
The problem is they've grown accustomed to urban environments, are way more fearless than they used to be.

I live rural (Ontario) and we hear but never see them. But if you go into town, they're a frequent occurrence. Grabbing people's pets and stuff.

If it was just foxes... fine. But coyotes can be a problem.

WalterBright 6 days ago|||
Once an owl sat on the porch railing, looking into the window. It was huge! What a magnificent sight.
coryrc 6 days ago|||
Good. Outdoor cats are a bigger problem than a few native coyotes.
chasd00 6 days ago|||
I’m definitely pro coyote but they’ve been known to snatch a leashed small dog while on a walk in Texas exurbs.
cmrdporcupine 6 days ago|||
don't get me wrong, i'm on team coyote and i keep my cat indoors. i like to listen to them yip at night around here when they've cornered a rabbit or something

but i've seen stories/footage of people's dogs-on-leashes getting attacked and that's a bit scary

jherskovic 6 days ago|||
Just give them all ACME catalogs and watch the problem solve itself.
sidewndr46 6 days ago|||
fox eat rats too
hephaes7us 6 days ago||
Farmers and pet-owners might prefer the rats.
bluefirebrand 6 days ago||
https://www.alberta.ca/albertas-rat-control-program

Relevant government website for those curious

We have online reporting for rat sightings that they take action on

tweaktastic 6 days ago||
Great read. I didn't know how exactly the rats were eradicated from Alberta something I have just heard and taken for granted. Reading the article provided a great overview of how much effort it really took to do it.

I would like to mention that, even though Alberta is rat free, we still have mice that can make your life misreble if they somehow enter your house/office.

cogman10 6 days ago||
Here in Boise Idaho, we are watching the local governments completely fail. We've not had rats here until somewhat recently. The State, County, and cities have all taken a "not our problem" attitude to it and instead of putting in any sort of pest management/eradication programs they've basically just said "good luck everyone".
Hugsbox 6 days ago||
Every so often I'll mention online that Alberta has no rats, and inevitably there will be an American responding in absolute disbelief saying I'm full of shit.

I may not live in Alberta, but luckily rats aren't really a thing in my neck of the woods. Travel an hour down the highway and it's a different story.

Also, as an aside, people often don't believe me when I say I've never seen a cockroach before in my life. Not a one. I've seen pictures of em, and I'm pretty sure if I saw one of those things irl I would absolutely shit myself.

skeeter2020 6 days ago||
"Alberta has no rats" is a bit of a simplification, as the linked article goes into in depth. They do find rat investations (typically) in the border zones, and some sneak through, both wild and domesticated. Due to ongoing management though the statement is true in broad strokes. We have lots of mice and all sorts of ground squirrels (including a ridiculously awesome "museum") but thankfully very few rats.

https://www.gopherholemuseum.org/

cf100clunk 6 days ago|||
Canada's shipping ports have had rat infestations for hundreds of years, even up the Great Lakes. DNA studies show that once a local population became established long ago, it defended itself repeatedly from incursions, and carries on. Alberta has no sea ports, so rats hitch rides there on trains, trucks, and in packaging. The scale is much, much smaller, so Alberta is somewhat able to eradicate them.
WalterBright 6 days ago||||
The exterminator told me you either have rats or mice. That's 'cuz the rats are good at eating the mice.
Hugsbox 6 days ago||
In some parts of the world I bet that's true. I can say with a high degree of certainty that I have neither.
Hugsbox 5 days ago|||
Nope, I can personally confirm there is not one single rat in Alberta. I counted them myself - counted the entire rat population in an afternoon. Only took so long because I'm terrible at counting, but I came to a final tally of zero.
d_runs_far 6 days ago|||
I spent the first half of my life in Alberta; had never seen a rat nor a cockroach. I moved further east in the country, cockroaches in my first apartment the first week there... and then discovered rats near the waterfront within the month.

My dad and uncles lived near the southern border as kids, would hunt rats by the train station/grain elevator with a .22 back in the 50's & 60's.

neonstatic 6 days ago|||
Re: cockroaches, I haven't seen them until my mid 30s, when I started traveling to warm countries.
paulmooreparks 5 days ago|||
I grew up in Florida, where you might come home and find a cockroach walking out of the bathroom with a towel around its head saying, "We need more toilet paper."

Okay, I kid, but it was almost that bad. We say there are no houses in Florida without cockroaches, just houses where they (mostly) aren't visible.

Now I live in Singapore, famous for being a clean city, and there are rats and cockroaches galore. Tropics, man....

drew870mitchell 6 days ago|||
Living in a warm climate US city i noticed roaches almost disappeared once off the first floor, i saw only one in five years in a 7th-floor apartment.
ipdashc 6 days ago|||
> I've seen pictures of em, and I'm pretty sure if I saw one of those things irl I would absolutely shit myself.

I always thought this was interesting (how many people are super scared of cockroaches). I'm absolutely terrified of bugs, I see cockroaches very rarely, and while I wouldn't pet one... They're not too bad? There's tons of bugs that are way scarier. Spiders, house centipedes, camel crickets. And that's just the stuff that actually exists near me. If I encountered an average Australian insect, good God, I'd run screaming. But cockroaches? Eh

I assume it's because cockroaches are associated with filth, and they tend to occur in large numbers. But as individual bugs, on the surface level they're not too bad. (Not "disagreeing" or anything, just think the different perspectives are neat)

rawgabbit 6 days ago|||
Spiders are beneficial. Please don’t kill them. Cock roaches do spread disease. I buy Combat Source Kill Max Roach Insect Killer Gel with fipronil.

https://www.epa.gov/ipm/cockroaches-and-schools

ipdashc 6 days ago||
I'm aware, I don't kill spiders if I can avoid it. And I know cockroaches are nastier. I just think it's surprising that people are so visually afraid of them, since they're not a very scary-looking bug.
rawgabbit 6 days ago||
Growing up poor, cock roaches symbolize poverty and the run down sad places I used to live in. I can’t stand them as they bring back bad memories of my childhood.
ipdashc 6 days ago||
That makes a lot of sense. I didn't think about it that way.
footy 6 days ago||||
Cockroaches make me uncomfortable, but I would not say I fear them. As a kid I was the designated person in the family to deal with all manner of bugs and just whatever.

Except for whatever reason, I am absolutely terrified of moths and butterflies. I don't want to be touched by either of those ever and I don't want them inside my house. I can appreciate butterflies are pretty and colourful and all that but I still don't want them to be near me.

FeteCommuniste 6 days ago|||
For me it's less fear than an instant "I must kill it / get it out of here" feeling. A big spider or centipede gives me a more intense "creepy crawly" shiver but a cockroach is way higher on the disgust scale for some reason.
ipdashc 6 days ago||
That makes total sense actually!
SoftTalker 6 days ago|||
I live in a wooded, fairly rural area and I see cockroaches outside, under leaves, fallen branches, etc. but they don't really come into the house.
mordechai9000 6 days ago||
Depending on where you live, those probably aren't the problematic species known as the German cockroach that typically infests human living quarters.
FeteCommuniste 6 days ago||
The big ones (oriental, not German) unfortunately come into my house pretty regularly. Setting out poison helps but hasn't rid of us of all of them.
mc32 6 days ago|||
Don’t receive shipments of goods from out of province then. Vermin get transported in packaging easily.
llm_nerd 6 days ago||
Alberta of course has rats. Short of being a hermit nation with impassable borders, the alternative is impossible.

But they maintain such a critically low number through aggressive, non-stop actions that we declare it "rat free", though that's a misnomer. Similar to the measles free status doesn't actually mean measles free, but rather that it isn't spreading uncontrolled.

Though as someone who lives in Ontario, I just wanted to add that I've never seen a vermin rat in my life in this province. Not in Toronto or its subways, not on its streets, nor in various other cities throughout the province. I've seen mice, of course, but never rats. I know they exist here, but someone having not experienced them doesn't mean much.

y2244 6 days ago|||
This bit made me laugh

But wild rats are rare. Albertans have grown so unaccustomed to rats that they frequently mistake squirrels, gophers, and other small animals for them: of the 875 reported sightings in 2025, only 47 turned out to be actual rats.

functionmouse 6 days ago||
I bet most of those were rats
ddarolfi 6 days ago||||
I've seen plenty of rats in Toronto. I used to live around Chinatown and I could practically punt a rat just walking out my door at night.
freediddy 6 days ago|||
I lived in Chinatown in Toronto (College and Spadina) and I saw a rat the size of a cat running around the inside of a Chinese supermarket around 2am when I was walking around at night during my university years. I also saw smaller rats and roaches running around Chinese restaurants as well.
soperj 6 days ago|||
where in Toronto did you live?

Definitely not my experience. Lived at Spadina & Dundas.

sidewndr46 6 days ago|||
isn't it kind of moot? there are plenty of other rodents. They fill the gap left by rats. I'm not really sure eliminating all rodents would be a good idea for the ecosystem.
Hugsbox 6 days ago||
Rats are, to my knowledge, more destructive and spread more disease. Obviously eliminating all rodents would be disastrous for the ecosystem, but rats in particular are an invasive species in North America so eliminating them specifically doesn't seem like such a bad idea.
tennfown 6 days ago|||
> Also, as an aside, people often don't believe me when I say I've never seen a cockroach

That one is pretty shocking. When I lived in South Carolina I remember I used to walk this one road late at night. Once it was dark enough I could see them scattering underneath the streetlights on the fucking sidewalk. Reminded me of sidewalk lizards in Florida, but grosser. I live in the Midwest now. I’m just glad they’re smaller here and don’t fly.

Hugsbox 6 days ago||
I'm told that the nearest city to me "probably" has cockroaches, but I avoid the city like the plague so no roach encounters for me thus far. I'm 30 and have never left the Canadian Maritime provinces in my life, so I guess it makes sense that there's plenty of "normal" things I've never come across.
rawgabbit 6 days ago||
[dead]
textmessage 6 days ago||
Albertan here. Never seen a rat outside of a research lab. We do have mice though.
msukkarieh 6 days ago||
there's no rats but there has been an uptick in voles and other rodents

also Alberta, Canada mentioned

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