It's a sign

 I saw one of the great lakes ships enter the canal at Duluth tonight,  via the web cam.  Laila & I got very interested in these huge ships after seeing one at Wisconsin Point some years ago & then joining several groups on Facebook that follow the ships. It is a sign of spring that the great lakes shipping season has begun.

Duluth canal bridge in the up position to admit the Paul R Tregurtha to the Duluth Harbor.

Tonight's arrival was the Paul R Tregurtha. They call her The Queen of the Lakes as this is the longest ship on the Great Lakes, all 1,014 feet of her. 
Tonight she was hauling or picking up a load of coal.

One more sign of spring even though it was only in the 20's this morning and the bird bath was frozen.