The lovely bird of prey

A bird is flying in the air.
It is a bird of prey.
I see a mission to be fair
if rebirth we obey,

its sudden plunge, its deadly claw,
both secondary traits
to it redeeming those by law
which charity awaits.

Be praised, you proud and faithful bird,
a killer only not.
Of natures two you are the third,
the way you reason got.