Incubation appears to have begun on Monday (3/25/13). I've noticed so far that Spark seems to be incubating most of the morning hours. Soon we'll post some tips on how to tell if the incubating falcon is Durand or Spark.
This is a blog for the Peregrine Falcon nest developed and maintained by the ODNR, Division of Wildlife. The nest is located on a ledge of the 41st floor of the Rhodes State Office Tower in Columbus, Ohio.