What specific vocalization gave the Great Kiskadee its common name?

Answer

The clear, sharp "Kiskadee! Kiskadee!" call.

The bird is famous for its loud, insistent call, which is frequently transcribed as the sharp phrase "Kiskadee! Kiskadee!".

What specific vocalization gave the Great Kiskadee its common name?
birdcharacteristicKiskadee