The growing population of geese at an Urbana lake is a sight city officials could do without. They hope new flashing strobes will keep them away.

Derek Liebert is project manager at the Urbana Park District. He says up to 90 Canada geese live at Crystal Lake. The lake is part of a park on the town's north side.

Liebert says goose droppings have increased nutrient levels in the water that have encouraged weeds to grow. The geese also graze along the shore and increase erosion.

The 14 solar-powered strobes were installed recently so Liebert isn't sure how well they'll work. They cost $4,000.

He says the real test will come in the spring when open water usually draws in many birds.