In … Mount Revelstoke Park, mortality of siskins and other winter finches … has been seen frequently enough over the last 25 years that they are called “grill birds” by the local inhabitants, in reference to their propensity to be collected by the front end of moving vehicles. http://iceandsnowtechnologies.com/articles/WildlifeSD.pdf
When I saw hundreds of Pine Siskins feeding on highway salt, I knew some would become grill birds.
As a vehicle approached, the siskins would take to the air.
But, depending upon the speed and size of the vehicle (which never slowed) the grill collected some.
No problem, the rest alighted again, sometimes continuing to feed amongst their fallen colleagues.
“In exchange for road salt, we happily do the danse macabre.”