[fibonachos]

There was (mockingbird?) near my home in the 90s who did a solid imitation of the multi- tone aftermarket car alarm that was common around that time. I recall being annoyed by it at the time since it often happened in the early morning hours. I kind of miss it now (or I’m just a little nostalgic for the sound of the time period).

[technothrasher]

When I was a teenager in the late 80's, I ran a BBS and a mockingbird outside my window learned the "paging sysop" beeps the computer made. It was very confusing, and like your bird, it was annoying because it was usually in the early morning hours.

[toast0]

The mockingbirds where I lived from 2009-2018 only sang the song of the car alarm. The original species became rarer and rarer, and generational distortion snuck in. It was definitely interesting comparing which parts of the alarm were mocked well and which were outside the range.

Otoh, really annoying on hot nights when everyone had their windows open and the damn things keep chirping all night. A neighbor found if you yell shut up really loud, you'll get about 5 minutes of peace.