Record cold and snow in the Windsor region has put a strain on animals used to a more moderate climate.
Wings Rehabilitation Centre in Amherstburg, Ont., just southwest of Windsor is crowded with injured animals.
Nancy Phillips, president of Wings, says the centre usually takes care of 300 animals. Right now, there are more than 500 at the centre.
"We're here to take in the needy," Phillips said. "In the last few days, we're getting different species we've never had before in the winter months.
"People are driving along [finding] ducks just in the middle of the road. They have no broken wings, just no body fat. They can't go any farther."
Wings is housing everything from ducks to possums to predator birds, like a screech owls.
Predator birds are struggling to find anything to eat right now.
"These guys are hungry. Really hungry. There's just no mice for them out there at this time," Phillips said.
She said someone found a screech owl on a window sill in Windsor.
A possum recently showed up with a case of frostbite so bad it caused the animals toes and tail to fall off.
Volunteer Barb Robson says the work is worth it.
"When you see them going from starving to putting on a little bit of weight and starting to get a little bit cheeky with you - like, 'out of my way, I'm a wild animal, get out of my way' - this is very very rewarding for us," Robson said.
Paul Pratt, naturalist at the Ojibway Nature Centre, says this winter could have lasting effects.
"This year with the deep snow cover, birds that forage on the ground are having a much harder time," he said. "So I suspect we're going to see big population crashes in birds that depend on that kind of habitat".