I have heard of found poems. I have not heard of a found haiku. But I offer one today from a favorite book: The Goldfinch by Donna Tartt.
For Day Three of National Poetry Month and in honor of the finches who returned to nest in the wreath on my front door, having mysteriously disappeared last spring during the onset of the COVID-19 pandemic.
finch singing out brilliantly
from the wreck of time
A house finch song on the first day of spring. Richard Griffin. CC BY-SA