January 9, 2017Delighted, for the past month we have had the pleasure of rare sightings of a Peregrine Falcon [falco peregrinus]. It is listed as an endangered species. Here are a few photos. photo: on the Arcosanti crane, December 9. 2016. [photos by Sue Kirsch] photo: in flight over the East Crescent, December 24. 2016. photo: on top of the Arcosanti crane, December 25. 2016.