Round Start:
"Run, cowards! Tweet tweet tweeeet!"
"Heavy has tiny bird head! Never speak of this."
"I am coming, cowards! To lay eggs in your mouth!"
"I live! ...with grotesque bird head. Is horrible!"
"Bird-Heavy lives! Hide your seeds and millet, cowards!"

Domination:
"As promised, Heavy will now lay egg in your mouth."
"Now Bird Heavy will vomit worms down your throat."

Under the effects of an ÜberCharge:
"Tweet-tweeeeet! Ha-ha-ha!"
"Hide, worms! Ha-ha-ha-ha!!"
"'Hide, worms!' Crawl from bulletproof Bird-Heavy!"

( I like the Chicken Kiev )