Why does a rooster crow, but a crow caws?

etymology

The two terms are both of imitative origin, crow appears to be older in usage and probably for that reason first applied to a common, domestic animal.

Cockcrow dates back to the 1350-1400 period;( Middle English), from Old English crawe, imitative of bird's cry.

Caw was first recorded in 1580-90; of imitative origin.

(Dictionary.com) (Etymonlne)

Related

Why in British spelling do verbs ending in a vowel plus l double the l when adding endings that begin with a vowel?
A word with the same connotation as "bureaucratic"?
Need word similar to 'fixer' but for a legit professional context
Do words that act as nouns and adjectives in the same form constitute a particular part of speech class?
How does one formally address and email when the gender of the recipient is unknown?
Why a "plan B" and not a "B plan"?
Linkage between reality and perception
A phrase that means you want someone in your care to get ill
How do I say that I will do something after everything else?
What does pip refer to in the phrase "squeeze someone until their pips squeak"?
How can you estimate how many people know a word? [closed]
"50-or-so candles" or "50 or so candles"?