Ryder, Ronald A., authorNatural Resource Ecology Laboratory, Colorado State University, publisher2007-01-032007-01-031969http://hdl.handle.net/10217/15783December 12, 1969.born digitaltechnical reportsengCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.Bird populations -- Colorado -- Pawnee National GrasslandBirds of prey -- Colorado -- Pawnee National GrasslandText