Response to letter regarding article "How far north are migrant birds transporting the tick Ixodes scapularis in Canada? Insights from stable hydrogen isotope analyses of feathers"
1 National Microbiology Laboratory, Public Health Agency of Canada, Canada; Groupe de Recherche en Épidémiologie des Zoonoses et Santé Publique (GREZOSP), 3200 Sicotte, Saint-Hyacinthe, Quebec, Canada J2S 7C6. Electronic address: nicholas.ogden@phac-aspc.gc.ca.
2 Canadian Wildlife Health Cooperative, Dept. of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Road, Guelph, ON, Canada N1G 2W1. Electronic address: ibarker@golden.net.
3 Canadian Wildlife Service, Environment Canada, 1125 Colonel By, Ottawa, ON, Canada K1A 0H3. Electronic address: Charles.Francis@ec.gc.ca.
4 Bird Studies Canada, 115 Front St., Port Rowan, ON, Canada N0E 1M0. Electronic address: aheagy@birdscanada.org.
5 Zoonotic Diseases & Special Pathogens Division, Public Health Agency of Canada, National Microbiology Laboratory, 1015 Arlington Street, Winnipeg, Canada R3E 3R2. Electronic address: robbin.lindsay@phac-aspc.gc.ca.