It's a metaphor!

In James Wright's A Blessing, the phrase in line 11, "They bow shyly as wet swans" is a metaphor. Even though it uses the word "as" which is common for similies, in this case, it redefines the ponies as wet swans. "As" can be used this way. For example, in plays, you can say "Joe Generic as Johnny Appleseed".

Nikolas is wrong!