Mockingbirds and Blue Jays exist to dive-bomb pets. The wing flicks of Mockingbirds are a mocking taunt.
Mockingbirds mocking Whippoorwills and Bobwhites are especially egregious.
People nowadays don't even know that the names Whippoorwill and Bobwhite are onomatopoeias.
Chuck-will’s-widows and whippoorwills are very strange and interesting birds. They are part of a group of birds called “nightjars.” Their names, as you have probably figured out, are onomatopoeias (onomatopoeiae?) for their calls. They have tiny beaks but huge mouths for catching insects on the wing. As nocturnal predators, they have big eyes. Their feathers provides incredible camouflage to avoid being spotted as they roost motionless during the daylight hours.Cats don't have to abide by the US Migratory Bird Treaty Act. Zot all of the Mockingbirds you want, Felix.
Actually his name was Charlie, an all black cat. I did have a cat named Felix too, and one named Oscar.