Spring, amongst all the foliage and woods where I used to live, is a season of bounty for birds. If they get as much to eat as all the seeds the cats have picked up on their coats, that will be plenty. The cats are covered with seeds, stickers, and burrs that adhere to my clothes and bedding.
Still, I find that preferable to the rainy season when sometimes two soaking wet cats at a time fly onto my head while I am asleep. I burrow under the covers and allow them to roll about on the quilt to dry themselves. I have had the quilt cleaned twice. Then there are the unspeakable, unmentionable critters that catch a ride on the undercoats of the cats. These, I pick off the quilt with paper towels. I also check my hair.