Question

how did the poet think of albatross ? what is the allusion in the line ?

Answer 1

Albatross is an innocent bird but he killed by mariner

Answer 2

The poet made an allusion to albatross as it was shot by an ancient mariner and died.

Albatross was an innocent bird.

Though nobody wanted to kill it, the bird accidentally died.

After his death, the crew of the ship regarded the killing of albatross as a right decision.

Later they wanted to get albatross back as it brought the wind for steering the ship.

Similarly, the poet in snake also wanted the snake back to avail his hospitality as the honored guest.