It's called a "Crow".
crow (kro): To exult loudly...boast.

(And yes, it's as loud as it looks. Every time Mousey gets killed, we go through this ritual.)

I was just sitting upstairs after a trip to the garden and trying to decide between two roses for my picture of the day, when I heard this Noise coming up the stairs. Camera was right there (where else?) so I got a couple shots of the victory parade, and this one. Tell me, did I really have a choice?

Please do check out my roses, the poor things. I never did end up deciding between them.
Tropicana Rose
Tiffany Rose