Can any one write or get a critical appreciation on this poem by Edward Thomas

THE GALLOWS
There was a weasel lived in the sun
With all his family Till a keeper shot him with his gun
And hung him up on a tree,
Where he swings in the wind and rain,
In the sun and in the snow
Without pleasure, without pain,
On the dead oak tree bough.

There was a crow who was no sleeper
But a thief and a murderer
Till a very late hour; and this keeper
Made him one of the things that were,
To hang and flap in rain and wind
In the sun and in the snow
There are no more sins to be sinned
On the dead oak tree bough.

There was a magpie, too
Had a long tongue and a long tail;
He could both talk and do -
But what did that avail?
He, too, flaps in the wind and rain
Alongside weasel and crow,
Without pleasure, without pain,
On the dead oak tree bough.

And many other beasts
And birds, skin, bone and feather,
Have been taken from their feasts
And hung up there together
To swing and have endless leisure
In the sun and in the snow
Without pain, without pleasure,
On the dead oak tree bough.

The poem describes animals that the "keeper" executed and
hung from the "dead" oak tree as if on a gallows. The animals
(weasel, crow, magpie) are those whose behavior can be imagined
as "criminal." The keeper is a kind of moral judge and executioner.

I think the poem is a good one.