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Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.
Crossley trekked with her husband through remote areas of the world including Guatemala, India, and Peru in search of elusive birds. Closer to home, Crossley aided her husband in a twenty year survey of breeding birds in eastern Iowa for the National Fish and Wildlife Service.
The Crossleys brought their knowledge to the public through a series of nature films. Frieda, able to apply her musical training to learning the call of birds, taught the elements of bird study to appreciative audiences at 4-H and Girl Scout camps.
Bielema, Ross, "Birdwatcher Recalls Early Trips," Telegraph Herald, February 19, 1990, p. 12