squawk 
(skwôk)
(skwôk)v. squawked, squawk·ing, squawks
v.intr.
1. To utter a harsh scream; screech.
2. Informal To complain or protest noisily or peevishly.
v.tr.
To utter with or as if with a squawk.
n.
1. A loud screech.
2. A noisy complaint.
[Imitative.]
squawker n.