I learned a word in a new language

The other day I was going into an office, walking up the wheelchair ramp, under a big mulberry tree. I heard a weird sound, never heard a bird say that before, looked to see what bird it was. It was a squirrel, on a branch, staring at me, and saying ka-ka-ka-kaaaaaahhhhh! The final sound was an odd growly hiss.
Excuse me? Have I offended you? ka-ka-ka-kaaaaaahhhhh!
What did I do to deserve being yelled at? ka-ka-ka-kaaaaaahhhhh!
Hmm, weird! ka-ka-ka-kaaaaaahhhhh!

I moved, made a noise, and the tomcat from next door ran out from under the ramp, stopped about 20 feet away.
The squirrel turned to face the cat, ka-ka-ka-kaaaaaahhhhh!
I now know a word in squirrel!
The things I learn....
:D