Odd year weather wise. Eighty degrees Fahrenheit one day and then just 4 degrees the next day.
So, the silver maple tree flowers have been doing strange things this Spring.
They're trying to bloom because it's that time of year, but not blooming normally nor profusely because of the weather. They're confused.

For more maple tree flowers from previous years: https://pbase.com/britestar/maple_tree_flowers