[birdky] Re: bizarre heron behavior
- From: lisa.hicks@xxxxxx
- To: birdky@xxxxxxxxxxxxx
- Date: Mon, 26 Jul 2004 16:16:52 -0400
Another $0.02 worth
Maybe that's why the landowners blocked access to this stretch of river in
the first place.....?
I've read several papers documenting disturbance related behaviours similar
to this - mostly in raptors, but makes sense for any 'high-strung' species.
One study watched a prairie falcon aerie during logging operations; that
study showed that constant noise and general cacophony was actually less
likely to cause young-endangering behaviour than the abrupt, surprise, types
of noise (e.g. a boy yelling). Makes sense to us humans, I suppose. Same
with eagle or osprey nests along a highway - background noise can seemingly
be adsorbed by some species with little or no adverse effects; while other
species whig out at the mere mention of human presence (I'm paraphrasing, of
course [grin])
LISA A HICKS
Environmental Scientist
Division of Water
14 Reilly Rd
Frankfort, KY 40601
ph. 502.564.3410 x434
email. lisa.hicks@xxxxxx
-----Original Message-----
From: Elizabeth.Ciuzio@xxxxxx [mailto:Elizabeth.Ciuzio@xxxxxx]
Sent: Monday, July 26, 2004 4:01 PM
To: birdky@xxxxxxxxxxxxx
Subject: [birdky] Re: bizarre heron behavior
When I read this story, the only thing I found to be bizarre is that someone
would allow their child to scream so much at a bird's nest that the birds
actually "worked themselves into a frenzy". If I was a bird that never saw
humans, I would jump and flap too at a screaming human being.
beth
-----Original Message-----
From: Shawchyi.Vorisek@xxxxxx [mailto:Shawchyi.Vorisek@xxxxxx]
Sent: Monday, July 26, 2004 8:57 AM
To: birdky@xxxxxxxxxxxxx
Subject: [birdky] Re: bizarre heron behavior
I agree - that would be bizarre but I tend to think that the adults did not
purposefully push the young out but that they probably got excited flapping
their wings, etc. and in the process the young got knocked out of the nest.
Shawchyi Vorisek
Avian Ecologist/Wildlife Diversity Program
KY Dept. of Fish and Wildlife Resources
#1 Game Farm Road
Frankfort, KY 40601
(502)564-5448 Ext. 368
shawchyi.vorisek@xxxxxx
http://www.kdfwr.state.ky.us/
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-----Original Message-----
From: Bruce Cryder [mailto:b.cryder@xxxxxxxxxxxxx]
Sent: Thursday, July 22, 2004 9:42 PM
To: Shawchyi.Vorisek@xxxxxx
Subject: Re: [birdky] Re: bizarre heron behavior
I guess it's not bizarre if you ignore the part of the report that
appears bizarre -- i.e., the adults pushing the young out of the nest.
If the report is accurate, wouldn't the actions of the adults qualify
as bizarre?
Bruce Cryder, Lexington
On Jul 20, 2004, at 9:17 AM, Shawchyi.Vorisek@xxxxxx wrote:
> Steve,
> I don't think this is bizarre at all. This is why we encourage folks
> to
> leave nesting sites (ie. rookeries) alone during the breeding season.
> The
> young obviously were not ready to leave the nest and could not yet
> fly. By
> being there, your friend inadvertently alarmed the rookery, and during
> the
> excitement, the young fell out of their nests plunging to their deaths.
> This is similar to what would happen if you went up to a robin nest
> with
> young close to fledging - they startle and often flutter out of the
> nest and
> hopefully land on a nearby branch. However, with these herons, they
> had
> nowhere to go but down into the water since they couldn't fly yet.
> Because
> of this, we really discourage folks from going near active nests of all
> native species. You may want to encourage your friend to canoe the
> area
> during the off-breeding months.
>
> Shawchyi Vorisek
> Avian Ecologist/Wildlife Diversity Program
> KY Dept. of Fish and Wildlife Resources
> #1 Game Farm Road
> Frankfort, KY 40601
> (502)564-5448 Ext. 368
> shawchyi.vorisek@xxxxxx
> http://www.kdfwr.state.ky.us/
>
> Confidentiality Notice:
> This e-mail message, including any attachment, is for the sole use of
> the
> intended recipient(s) and may contain confidential information. Any
> unauthorized review, use, disclosure or distribution is strictly
> prohibited.
> If you are not the intended recipient, please contact the sender, by
> e-mail,
> and destroy all copies of the original message.
>
>
> -----Original Message-----
> From: Kistlers [mailto:kistlers@xxxxxxxxx]
> Sent: Monday, July 19, 2004 6:47 PM
> To: Bird line
> Subject: [birdky] bizarre heron behavior
>
>
> This is a third hand report from a friend of a friend:
> A woman and her young son were canoeing on the Nolin River
> recently when
> they passed a small great blue heron rookery which has been known for
> several years. This is a little-used stretch of river, due to the fact
> that
> private landowners have gone to great lengths to blcok access to
> boaters.
> It's hard to find a spot to even launch a kayak. When they passed the
> rookery, the young boy cried out loudly in excitement. What happened
> next is
> very strange: the birds started to panic and worked themselves into a
> frenzy. The adults then pushed the baby birds out of the nest into the
> river, where they drowned. The canoers were completely horrified. My
> friend
> says that she is entirely trustworthy.
> Has anyone heard of such strange behavior ? The whole thing seems
> unbelievable.
> Steve Kistler
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