The barns at the farm are filled with multiple batches of kittens, but it sounded like I had kittens in my yard too with the arrival of Gray Catbirds. One of their common call is a like a lost kitten mewing, but their long song may last for up to 10 minutes which may mimic other birds as well as mechanical and musical notes and phrases. The catbird singing by my porch this evening almost sounded like it was saying “pretty bird” even though not a colorful bird.
Noisy Gray Catbird