Thestrals

Only when you've seen death
you can see these creatures
and their many wonderous
horse-like features

If you can see them
you know they have wings
and fly through the air
like owls and other things

They are extremely fast
and like to eat meat
they have scaley type skin
and hooves on their feet

You may not see them
but still they are there
with their horse-like features
and their wings which they flair