Birders, We can consider the impacts of birding and other recreational pastimes on birds by looking at research conducted by recreation ecologists. It's important to look beyond our personal experience, to look at collective experience and impacts, subject to objective observation and interpretation. This field of study grew in response to the degradation of popular wild places by overuse and irresponsible use for recreation during decades following WWII and building of our interstate highway system (imagine birding without it!). During the 80's and 90's early sloganeering about trash and wildfire matured into hard science, Smokey Bear and Woodsy Owl matured into The Seven Principles of Leave No Trace (LNT). In birding, the ABA code of ethics became an early guide for those of us concerned about limiting impacts. The Leave No Trace movement experienced parallel growth with the science of recreation ecology. LNT relies on recreation ecologists for authority of resource when defining recommendations for low impact outdoor recreation. I found applicable research in less than thirty-seconds by searching the internet. This pdf offers results of birder impacts on birds at around pages 8 and 9, http://www.elcr.org/resources/birds.pdf The research demonstrates significant impacts by birders. Simple behaviors, direct approach (as in chasing that photo) cause stress and changes in bird behavior by birds already investing energy in migration or defending territories, and so on. Casual trail networks through wild places form rapidly following few footfalls, etc. Take a look at research from recreation ecology, you may be surprised (Jeff Marion, at Virginia Tech, http://frec.vt.edu/Faculty/JeffMarion.html leads a lot of interesting research). The ABA Code of Ethics is found here http://www.aba.org/about/ethics.html For more on Leave No Trace, visit www.LNT.org. During the discussion of birder impacts precipitated by concern for our new Fish Crows, little has been mentioned about the importance of courtesy to other birders and non-birding recreation area users or local residents. Courtesy goes a long way in birding as elsewhere. Many of my sightings and attempts have been terminated by other birders or photographers plowing ahead to get in close. I've found myself guilty of same a few times, then I do better, I hope. The Seventh Principle of LNT is, "Be considerate of others visitors." I think it's a good idea for users of this listserv, too. Mostly, we birders do well at both I think. Tom Bain OOS conservation committee chair Delaware County ______________________________________________________________________ Ohio-birds mailing list, a service of the Ohio Ornithological Society. Our thanks to Miami University for hosting this mailing list. Additional discussions can be found in our forums, at www.ohiobirds.org/forum/. You can join or leave the list, or change your options, at: http://listserv.muohio.edu/scripts/wa.exe?LIST=OHIO-BIRDS Send questions or comments about the list to: [log in to unmask]