Check out pages from other organizations on indoor/outdoor cats:
American Bird Conservancy
The Humane Society of the United States
Canadian Federation of Humane Societies
Ontario Society for Prevention of Cruelty to Animals
Toronto Animal Services
Articles available online about the impacts of free-roaming cats:
Domestic Cat Predation in California, Florida and Hawaii A Resource for Educators and Activists
Domestic Cat Predation on Birds and Other Wildlife
Impacts of feral and free-ranging cats on bird species of conservation concern:
a five-state review of New York, New Jersey, Florida, California, and Hawaii
Studies on the Impact of Outdoor Cats
Ecological impact of inside/outside house cats around a suburban nature preserve
Landowners and cat predation across rural-to-urban landscapes
Other Journal Articles on free-roaming cats:
Adamec, R. E. 1976. The interaction of hunger and preying in the
domestic cat (Felis catus): an adaptive hierarchy? Behavioral Biology
Angold, P. G., et al. 2006. Biodiversity in urban habitat patches. Science
of the Total Environment 360:196–204.
Askins, R. A. 1995. Hostile landscapes and the decline of migratory
songbirds. Science 267:1956–1957.
Baker, P. J., R. J. Ansell, P. A. A. Dodds, C. E.Webber, and S. Harris. 2003.
Factors affecting the distribution of small mammals in an urban area.
Mammal Review 33:95–100.
Baker, P. J., A. J. Bentley, R. J. Ansell, and S. Harris. 2005. Impact of
predation by domestic cats Felis catus in an urban area. Mammal
Beckerman, A. P., M. Boots, and K. J. Gaston. 2007. Urban bird declines
and the fear of cats. Animal Conservation 10:320–325.
Calhoon, R. E., and C. Haspel. 1989. Urban cat populations compared
by season, subhabitat and supplemental feeding. Journal of Animal
Centonze, L. A., and J. K. Levy. 2002. Characteristics of free-roaming
cats and their caretakers. Journal of the American Veterinary Medical
Churcher, P. B., and J. H. Lawton. 1987. Predation by domestic cats in
an English village. Journal of Zoology, London 212:439–455.
Dunn, E. 1991. Predation at feeders: close encounters of the fatal kind. Feeder-Watch News 4(1):1-2.
Foley, P., J. E. Foley, J. K. Levy, and T. Paik. 2005. Analysis of the impact
of trap-neuter-return programs on populations of feral cats. Journal
of the American Veterinary Medical Association 227:1775–1781.
Galbreath, R., and D. Brown. 2004. The tale of the lighthouse-keeper’s
cat: discovery and extinction of the Stephens Islandwren (Traversia
lyalli). Notornis 51:193–200.
George, W. G. 1974. Domestic cats as predators and factors in winter
shortages of raptor prey. Wilson Bulletin 86:384–396.
Gillies, C., and M. Clout. 2003. The prey of domestic cats (Felis catus)
in two suburbs of Auckland City, New Zealand. Journal of Zoology,
Hawkins, C. C. 1998. Impact of a subsidized exotic predator on native
biota: effect of house cats (Felis catus) on California birds and
rodents. Ph.D. dissertation. Wildlife and Fisheries Sciences, Texas
A&M University, College Station, Texas.
Hughes, K. L., M. R. Slater, and L. Haller. 2002. The effects of implementing
a feral cat spay/neuter program in a Florida county animal
control service. Journal of Applied Animal Welfare Science 5:285–
Iverson, J. B. 1978. The impact of feral cats and dogs on populations of
the West Indian rock iguana, Cyclura carinata. Biological Conservation
Jessup, D. A. 2004. The welfare of feral cats and wildlife. Journal of the
American Veterinary Medical Association 225:1377–1383.
Levy, J. K., and P. C. Crawford. 2004. Humane strategies for controlling
feral cat populations. Journal of the American Veterinary Medical
Liberg, O. 1984. Food habits and prey impact by feral and house-based
domestic cats in a rural area in southern Sweden. Journal of Mammalogy
D. C. Turner and P. Bateson, editors. The domestic cat: the biology of its behaviour. Cambridge University
Press, Cambridge, United Kingdom.
May, R. M. 1988. Control of feline delinquency. Nature 332:392–393.
Meckstroth, A. M., A. K. Miles, and S. Chandra. 2007. Diets of introduced
predators using stable isotopes and stomach contents. Journal of
Wildlife Management 71:2387–2392.
Nogales, M., A. Mart´ın, B. R. Tershy, C. J. Donlan, D. Veitch, N. Puerta,
B. Wood, and J. Alonso. 2004. A review of feral cat eradication on
islands. Conservation Biology 18:310–319.
Nowell, K., and P. Jackson, editors. 1996. Status survey and conservation
action plan: wild cats. IUCN, Gland, Switzerland, and Cambridge,
Patronek, G. J. 1998. Free-roaming and feral cats—their impact on
wildlife and human beings. Journal of the American Veterinary Medical
Pennington, D. N., J. Hansel, and R. B. Blair. 2008. The conservation
value of urban riparian areas for landbirds during spring migration:
land cover, scale, and vegetation effects. Biological Conservation
Schmidt, P. M., R. R. Lopez, and B. A. Collier. 2007. Survival, fecundity,
and movements of free-roaming cats. Journal of Wildlife Management
Slater, M. R. 2004. Understanding issues and solutions for unowned,
free-roaming cat populations. Journal of the American Veterinary
Medical Association 225:1350–1354.
Soul´e, M. E., D. T. Bolger, A. C. Alberts, J. Wright, M. Sorice, and
S. Hill. 1988. Reconstructed dynamics of rapid extinctions of
chaparral-requiring birds in urban habitat islands. Conservation Biology
Terborgh, J. 1992. Why American songbirds are vanishing. Scientific
Winter, L. 2004. Trap–neuter–release programs: the reality and the
impacts. Journal of the American Veterinary Medical Association
Woods, M., R. A. McDonald, and S. Harris. 2003. Predation of wildlife by
domestic cats Felis catus in Great Britain. Mammal Review 33:174–
TNR Reality Check’s References Page
Peta takes a stand against free roaming cats