Wayne, Most of the studies I have had recommended to me (on this topic) are somewhat simplified, consisting of feeding lethaly poisoned rodents to caged raptors. Only the first article (of those listed below) consists of field observations, and it contains a single record of raptor poisoning. Additionally, I am aware of a single confirmed case of screech owl death due to rodenticide poisoning in Central Park, NYC between 2001-2003. It does occur, but I don't know whether it occurs frequently enough to be a management issue.
[links to JSTOR] P.L. Hegdal et al. 1986. Hazards to Wildlife Associated with 1080 Baiting for California Ground Squirrels Wildlife Society Bulletin, Vol. 14, No. 1.:11-21. H. B. Bell; R.W. Dimmick. 1975. Hazards to Predators Feeding on Prairie Voles Killed with Zinc Phosphide The Journal of Wildlife Management, Vol. 39, No. 4.:816-819 V. M. Mendenhall; L. F. Pank 1980. Secondary Poisoning of Owls by Anticoagulant Rodenticides Wildlife Society Bulletin, Vol. 8, No. 4: 311-315. M. G. Townsend et al. 1981. An Assessment of the Secondary Poisoning Hazard of Warfarin to Tawny Owls The Journal of Wildlife Management, Vol. 45, No. 1.:242-248. ============== ANDY MARTIN Ph.D Student Fordham Univeristy "It is far simpler to build a road than to think of what the country really needs" - Aldo Leopold ----- Original Message ---- From: The Shrew Shrine <[EMAIL PROTECTED]> To: [email protected] Sent: Monday, June 25, 2007 5:47:00 PM Subject: Re: ECOLOGY Poisoning Secondary Raptors Dear Wayne, The topic is interesting. - I believe that raptors go for live animals (i.e. movoing). They are not scavengers. It depends, however, wich poisons are involved. A poison can reduce the animal's locomotorics and might therefore make it more susceptible to predation. (?) I am not aware of any specific papers dealing with this. Werner >Forum: > >Can anyone link me studies that confirm raptor poisonings from eating >poisoned rodents? > >Thanks, >WT -- Dr. Werner Haberl Former Chair, Insectivore Specialist Group, IUCN Hamburgerstrasse 11/17 A-1050 Vienna, Austria Phone & Fax: (+431) 941 13 13 E-Mail: [EMAIL PROTECTED] The Shrew Shrine: <http://members.vienna.at/shrew> or new: http://members.chello.at/natura The Dormouse Hollow: http://www.glirarium.org/dormouse Get news delivered with the All new Yahoo! Mail. Enjoy RSS feeds right on your Mail page. Start today at http://mrd.mail.yahoo.com/try_beta?.intl=ca
