Similes are comparison using "like or as"
Metaphors are comparisons without using "like or as"
We see them sitting under trees, at night, in my yard, like a photo of a family.
they are comparing the "them under the trees" with "the photo of a family"
Then they dart away, their tails held high, six white arrows point at the sky
They are comparing the tails held high, with "six white arrows" pointed at the sky
Into the night they disappear, and though they move as quick as spears, a little later they'll be back here
They are comparing how fast they disappear with spears
hope this helps
