Extreme Temperatures
Grebes are smaller cousins to the loon, and spend their entire lives in the air or on the water. But with more than 80 per cent of the Great Lakes covered in ice, grebes are having a tough time finding open water to land in during Ontario's deep freeze. That's forced some grebes to touch down on solid ground, where they lack the ability to walk or take flight again.
"If the grebes land on land, they're dead," said Gail Lenters, who operates the Shades of Hope Wildlife Refuge, located north of Toronto, near Lake Simcoe.
Joshua Nowicki, 35, said he spotted the 12-inch-tall structures on Silver Beach in St. Joseph on Valentine's Day and decided to photograph the "sand towers" to make up for missing an opportunity to capture images of similar structures he discovered on a beach about three years ago.
Nowicki captured several images and a short video showing off the structures.

Palestinian children play in the snow in the village of Tuqu' near the West Bank city of Bethlehem on Friday.
Roads in and out of Jerusalem were closed and streets deserted in the Jordanian capital of Amman.
The snow covered large swathes of desert, and Jerusalem's famous western wall and Bethlehem's nativity church were sprinkled with white.
The Syrian capital Damascus and surrounding mountains also got snow, while a snowstorm in neighbouring Lebanon closed most mountain roads, isolating villages.
The results were spectacular. Raise your cup of hot chocolate (or iced tea, if you're out West) to Foster, who told Slate's Eric Holthaus about stepping into the frozen icescape to guide his drone and film the video.
The EPA wants to ban fossil fuels, because they are making lake ice disappear in the US

Snowy owl
The owl was photographed at the settlement of Bóly in Baranya county, after which bird-watchers from the ornithological society travelled to the scene to verify the sighting. Subsequently, several observers arrived to the area and a large number of good-quality photographs were taken.
A bitterly cold chill known as the "Siberian Express" has enveloped much of eastern America, sending temperatures plummeting up to 40 degrees below their normal February levels to record lows in at least 100 places.
Southern states such as Tennessee and Kentucky suffered some of the most extreme drops on the thermometer as bone-chilling air from Siberia settled on the region after snowstorms passed through.
The relentless cold has blanketed the country's north-east for weeks, alternating heavy snowfall with spells of clear but gnawingly chilly skies.
In New York's Central Park, temperatures were expected to fall to -17C, but that was before a windchill factor with gusts that made it feel another 10 degrees colder. The city is on course for its coldest February in history.

Turkish Airlines cancelled all domestic flights in and out of Istanbul Atatürk International Airport on Thursday morning, due to heavy snowfall.
Turkey's largest city İstanbul was hit by a storm that has dumped up enormous amounts of snow in some areas, wreaking havoc on roads. The depth of the snow reached its deepest on İstanbul's European side neighborhood of Çatalca at 70 centimeters.
Turkey's national carrier, the Turkish Airlines (THY), canceled its some flights on Thursday, both domestic and international, due to the two-day snowstorm. A list of canceled flights is available on the THY website. İstanbul authorities also closed some ferry lines on Thursday.
OMGosh!!!! - this is Summerside PEI this morning!! photo from CBC New Brunswick pic.twitter.com/MwpUuy2h57Snow always makes driving more difficult, but in Prince Edward Island, so much of it has fallen many people can't even find their cars.
A winter storm has dropped almost a metre of snow in the past few days, and it's often hard to see where the road ends and the ditch begins. On some rural roads, snowbanks are piled three times higher than the people standing next to them.
The Journal Pioneer reported that some residents dug an eight-metre-long tunnel to try to find their car under white stuff piled two storeys high. The island itself is nearly invisible when viewed from space, as satellite images show.
This next push of arctic air is expected to bring air that is just as cold, or even colder than the air that brought subzero lows to the Midwest and Northeast during the weekend.
Millions will shiver from Chicago to New York City as record lows are challenged during this bitter blast. Records may also fall across parts of the South where temperatures manage to fall into the teens and single digits.
Some southern cities forecast to dip into the teens or lower include Birmingham, Alabama; Charlotte, North Carolina; Columbia, South Carolina; Nashville and Atlanta.
Floridians will even experience a taste of the arctic chill with temperatures dipping down to the lower 30s in cities such as Orlando, Melbourne and Daytona Beach.
The worst of the cold is expected to focus over the East for Thursday into Friday.
In the mid-Atlantic, some daily record lows set during the late-1800s will be challenged.
AccuWeather.com RealFeel® temperatures below 0 F will be common across the regions during the daytime hours, including cities along the Interstate 95 corridor. These values can then drop by as much as 20 degrees during the overnight hours, making for a bitterly cold morning commute.
Snow showers are also likely to develop downwind of the Great Lakes late in the week even though the lakes are quickly becoming covered in ice.
Temperatures can be very dangerous, and possibly even life threatening during this arctic outbreak.
Comment: It appears to shaping up to be a re-run of last years' mass avian die-off (due to the extreme cold and extensive ice cover), see these March, 2014 reports:
Hundreds of ducks found dead around Great Lakes due to ice cover
10 Fold increase in the number of dying water birds rescued in Toronto due to extreme cold
Death toll of waterbirds on frozen Lake Erie likely to number tens of thousands