Swartzman, G. L. (Gordon L.), authorNatural Resource Ecology Laboratory, Colorado State University, publisher2007-01-032007-01-031969-12-10http://hdl.handle.net/10217/6290In this paper a preliminary model for the population and biomass change over time is given for bird populations. The interaction between biologist and modeler in the development of the model and its parameters is emphasized. The model consists of two constant coefficient differential equations. The output of the model, applied to the lark bunting, is compared with results of field experiments. Discussions of further extensions of the model as well as present difficulties are also included.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.Pawnee National GrasslandsCentral Plains Experimental Rangebird populationbiomass changelark buntingPawnee SiteBird populationsBiomassText