| Sciurus carolinensis J Koprowski Mammalian Species 480, 1-9, 1994 | 241 | 1994 |
| Squirrels of the world RW Thorington Jr, JL Koprowski, MA Steele, JF Whatton JHU Press, 2012 | 223 | 2012 |
| North American tree squirrels MA Steele, JL Koprowski Smithsonian Institution Press, 2001 | 215 | 2001 |
| Plant–frugivore networks are less specialized and more robust at forest–farmland edges than in the interior of a tropical forest S Menke, K Böhning‐Gaese, M Schleuning Oikos 121 (10), 1553-1566, 2012 | 153* | 2012 |
| Handling tree squirrels with a safe and efficient restraint JL Koprowski Wildlife Society Bulletin, 101-103, 2002 | 124 | 2002 |
| Sciurus niger JL Koprowski Mammalian Species 479, 1-9, 1994 | 123 | 1994 |
| Alternative reproductive tactics in male eastern gray squirrels:“making the best of a bad job” LK John Behavioral Ecology 4 (2), 165, 1993 | 123 | 1993 |
| The response of tree squirrels to fragmentation: a review and synthesis JL Koprowski Animal Conservation 8 (4), 369-376, 2005 | 122 | 2005 |
| Natal philopatry, communal nesting, and kinship in fox squirrels and gray squirrels JL Koprowski Journal of Mammalogy 77 (4), 1006-1016, 1996 | 117 | 1996 |
| Removal of copulatory plugs by female tree squirrels JL Koprowski Journal of Mammalogy 73 (3), 572-576, 1992 | 86 | 1992 |
| Response of fox squirrels and gray squirrels to a late spring-early summer food shortage JL Koprowski Journal of Mammalogy 72 (2), 367-372, 1991 | 76 | 1991 |
| Nowhere to run and nowhere to hide: response of endemic Mt. Graham red squirrels to catastrophic forest damage JL Koprowski, MI Alanen, AM Lynch Biological Conservation 126 (4), 491-498, 2005 | 75 | 2005 |
| Should we consider individual behavior differences in applied wildlife conservation studies? MJ Merrick, JL Koprowski Biological Conservation 209, 34-44, 2017 | 72 | 2017 |
| Direct effects of fire on endangered Mount Graham red squirrels JL Koprowski, KM Leonard, CA Zugmeyer, JL Jolley The Southwestern Naturalist, 59-63, 2006 | 60 | 2006 |
| Tree squirrel introduction: a theoretical approach with population viability analysis DJA Wood, JL Koprowski, PWW Lurz Journal of Mammalogy 88 (5), 1271-1279, 2007 | 55 | 2007 |
| Tree squirrels as invasive species: conservation and management implications GH Palmer, J Koprowski, T Pernas | 54 | 2007 |
| coNFLICT BETWEEN THE SEXES: A REVIEW OF SOCIAL AND MATING SYSTEMS OF THE TREE SOUIRRELS JL KOPROVVSKI | 54 | 1998 |
| Sharpening the craft of scientific writing. JL Koprowski Journal of College Science Teaching 27 (2), 133-35, 1997 | 52 | 1997 |
| Global hotspots and knowledge gaps for tree and flying squirrels JL Koprowski, R Nandini Current Science, 851-856, 2008 | 47 | 2008 |
| Selection of drey sites by Abert's squirrels in an introduced population AJ Edelman, JL Koprowski Journal of Mammalogy 86 (6), 1220-1226, 2005 | 42 | 2005 |
