Ed Sokol's Mount Prospect backyard has become home to a mother robin who has chosen an unusual nesting place -- a bison skull that hangs from a shed.
"This is the second season; we think it was born here last season," Sokol said.
"There was a nest with four eggs, and they were nesting for a month or six weeks."
Sokol said according to what he has read, robins don't often build nests in the same location twice, "so I was surprised to see them this year."
As for the bison skull, Sokol and his family bought it four years ago from Woodside Ranch in Mauston, Wis., where the Sokols have been vacationing for years.
And the future of the robin family?
"We just leave them alone and enjoy watching them," said Sokol.