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make a rapid succession of slight cracking noises
Depends on the circumastances, when stressed/ excited / getting fed they make squeaking noises.
AnswerIt means to make loud noises when it is quiet out.
Clarification needed: do you mean seagulls?
its usually referred to who babies make noises since they cant speak a real language
It means he wants your attention and he probably likes you.
Duck and COVER!!!!!!!!!!!!!!!!!
It means to make shapes with your mouth to make noises at (usually) a very young age.
because they are mean and uber-socially-incapable
It depends on what kind of noises, but I'll just assume that these are sexual noises. He may be horny, immature, or just a freakin' weirdo.
If you mean choices....then noises and voices.
Yes, this could indicate that they are either already bred or just not in season yet.