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Surveys Relative to BluebirdersDate: Tue, 16 Jan 2001 08:03:01 -0500 To the Bluebird Lists, please answer the following two survey questions: If you have HOuse SParrows (HOSP) in your area, AND you use 2-holed nestboxes (like Linda's mansions or Barry's NABS with two holes,) please answer these two questions: 1. Have the HOSP continued to be a problem? 2. What size is your box (inside measure like 4x5.5 or 4x6, etc.) If you want you can add the height from bottom of entrance to floor. Thank you very much for a reply. Send replies to femad"at"comcast.net Fawzi Emad from MD Date: Tue, 16 Jan 2001 09:17:40 -0500 I forgot to mention that this survey is being conducted for the three of us (Linda Violett, Barry Whitney and Fawzi Emad.) I am the one collecting the information, so please if you have HOSP, and you have used the 2-hole boxes, please answer two questions: 1. Did the HOSP problem continue? 2. Size of INSIDE of 2-hole box (like 4x6 or 4x5.5, etc.) If you like, you can include the height from bottom of entrance to floor. Thank you, and please return this to me at femad"at"comcast.net Thank you. Fawzi from MD From: "BONNIE A. YEAGER" dement"at"frognet.net To: Bluebird-L"at"Cornell.edu (BLUEBIRD-L) Subject: Poll Date: Fri, 8 Feb 2002 17:45:02 -0500 I am would like to poll BB-L and ask you to use your expertise in answering the following question. What are the four top threats to EABL nest sites in order of
severity, i.e. sparrows, blowflies, starlings, hypothermia,
sparrows, starlings, hawks, owls, cats, raccoons, snakes etc.?
Please list in order of severity: 1 = most severe threat, 2
= second most severe threat, 3 = third most severe threat, 4
= fourth most severe threat. From: "BONNIE A. YEAGER" dement"at"frognet.net To BB-L, Thank you all for participating in the poll. In summary, No Surprises! Predation is the major threat and the HOSP is at the top of the list. Weather is percieved as the number two threat, more specifically: heat (summer-south), cold (spring-north), and/or hypothermia from wet nests. The four major threats in order of severity are as follows: 1. HOSP (31%); 2. Weather (18%); 3. Raccoons (11%); 4. HOWR (9%), Blowflies (9%), and Snakes (8%). The results of the poll are shown in the table below. I weighted
each threat category as follows: the most severe threat (1)
was assigned a value of 1, the second most threat (2)
was assigned a value of 0.75, the third most threat (3)
was assigned a value of 0.50, and the least severe threat
(4) was assigned a value of 0.25. Approximately the same
outcome is obtained if all four of the threat levels are assigned
a value of 1. Date: Wed, 13 Feb 2002 17:06:06 -0800 (PST) Rob Yaksich I read Fred's post with interest about what we as monitors perceive as the biggest threat to our little feathered tenants. I find it interesting that habitat loss wasn't mentioned. In my mind, I consider that the biggest threat, not only to cavity-nesters, but to all species. And if you think about it, HOSP difficulties are directly tied with habitat loss as suburbs sprawl out and development reaches into once "wild" areas. Where humans go, so go the HOSPS (and starlings and cats and increases in raccoon populations). I'm trying to find the source, but I read that where raccoons are present before urbanization, they increase dramatically following it. So another of our critical issues attributed to habitat loss. And we should remember that nesting sites and hunting/foraging sites aren't one in the same. Barn owls, for example, may have places to nest in buildings or boxes or barns (no, really?:) ), but if their hunting grounds are swallowed up by development, what good is it to have a nesting place? Barn owls are experiencing significant declines in North America due directly to habitat loss (I'll look up my sources on this one too). I just wonder if we reduce the amount of habitat being destroyed if some of these problems wouldn't then take care of themselves. RY --- "BONNIE A. YEAGER" dement"at"frognet.net wrote: ... ===== From: "Teri Casper" ticpen99"at"hotmail.com We would like to invite Bluebird list members to visit www.BRAW.org,
look around, and take part in our new feature-a survey question.
Each quarter we It is meant to be informal and give people another chance to talk about bluebirds. Teri Casper, Chair, Public Relations for BRAW |
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