Little is known about how density-independent and density-dependent processes affecting population dynamics vary geographically across species' ranges. To address this problem for three vertebrate species (Northern Bobwhite [Colinus virginianus], Ring-necked Pheasants [Phasianus colchicus], and eastern cottontails [Sylvilagus floridanus]), we examined spatially subdivided, long-term (1966–2001), seasonal (January, April, July, and October), time-series data from the Kansas Rural Mail Carrier Survey, USA. All three species have range boundaries in Kansas, with population abundances declining toward the periphery of their ranges. We quantified the strengths of density-dependent and density-independent processes affecting the dynamics of 10 populations of each species ranging from low (peripheral) to high (central) mean abundance using first-order autoregressive models that incorporate measurement error. For all three species, peripheral populations with lower mean abundance tended to have greater population...