...on my commute. A little chirp-chirp-chirp sort of bird. I've never actually seen him, so I can't tell you what he looks like. But he sounds exactly like a squeaky jockey pulley.
I should tell you that I absolutely hate noises on my bike. Well, any bike, actually. I'm the type who always carries chain lube on my commute so I can offer to silence other people's squeaky chains. So when something on my bike is making a noise, I pretty much drop any idea of going fast or pedaling hard and go into full diagnostic mode.
This amazing ventriloquist of a bird apparently amuses himself by chirping in perfect sync with whatever my cadence happens to be that day. This confuses me of course, because my pulley should be squeaking at a different (but related) frequency...is it my pedal? Bottom bracket? Rear hub? Saddle rails? Fender struts? Is my frame cracked...?
No. It's that damn bird. Again.
And just when I figure that out, he flies away further up my route to await the exact moment when I've forgotten about him, and starts it up all over again.
One of these days, my fine feathered friend, I'm going to force open that little beak and empty a bottle of Triflow down your gullet.