When your windows reflect the trees and sky, a bird may fly right into the window and break its neck. Millions and millions of birds die this way each year. The only way to prevent this is to put up a net in front of your window, especially during migration. The birds bounce off the net, shaken but alive. Strips of mylar in front of the window may also work.
Hummingbirds are great fun to watch.
Stir until the sugar is completely dissolved. Let the mixture cool before filling the feeder. Do not add any coloring. Instead, use a feeder with red plastic flowers to initially attract the hummingbirds. Or plant flowers that attract hummingbirds.