Vernon Mooers writes

Dawn Train

 

Out past the marsh 
the train whistle blows 
like a trumpeter swan. 
Something in the night 
     something sad 
has made him want to fly. 
Sabagicha: 
The Last Post.

He will abandon this place. 
leave his mate behind. 
Her nest is empty now and 
the eggs cringe 
from the cold light 
shiver in the morning wind.

 The Threatened Swan -- Jan Asselijn