Subject: [Tweeters] Sick and dying Siskins and other finches (long)
Date: Tue Jan 5 19:40:16 PST 2021
From: Steven Dammer - dammerecologist1990 at gmail.com

This is some good insight.

I had a feeling the superflight caused a massive level of exhaustion
amongst finches competing with one another as they search for food. While
it sounds like Salmonella is a possibility, I'm noticing with the Pine
Siskins at my feeder a lot of fighting, and the one I was able to approach
and have hop on my finger was getting the worst of it. With populations of
finches exploding from the spring surplus, the prevalence of weaker birds
also increases, so I'm guessing it's just natural selection on a more
noticeable scale.

Could be a lot of things! But just as a precaution it never hurts to clean
the feeder out a bit more often just in case..

-Steven

On Tue, Jan 5, 2021 at 2:47 PM dan&erika <danerika at gmail.com> wrote:


> Dave and other Tweeters--

>

> The comments that Dave made about siskins are interesting and I am

> inclined to believe he is correct. My 2 cents to this conversation is that

> siskins have just this month discovered our banding station in Olympia. The

> birds we have banded this year have been remarkably emaciated, perhaps

> indicating that they have been having great difficulty finding food sources.

>

> dan

>

> On Tue, Jan 5, 2021 at 2:40 PM <dpdvm at whidbey.com> wrote:

>

>> Hello Tweeters,

>>

>>

>>

>> As a veterinarian who treats wildlife, I would like to weigh into the

>> conversation concerning Salmonellosis in sick and dying Siskins and other

>> finches. I have done more than my share of attempting to treat (always

>> futile) and euthanization of these sick birds.

>>

>>

>>

>> Important fact - Salmonella is a natural and normal inhabitant of the

>> gastrointestinal tracts of almost all birds, reptiles and amphibians. These

>> bacteria do little or no harm to a healthy individual and perhaps may be

>> beneficial. As an aside, better cook that chicken or turkey very well!

>> During commercial poultry processing, it is almost impossible to avoid some

>> fecal contamination of the meat.

>>

>>

>>

>> Do feeders play an important role in the transmission of Salmonellosis?

>> There are so many variables it is difficult to sort them all out. Why is it

>> the case that some individuals who rarely clean their feeders report no

>> cases of sick finches while others who clean and bleach their feeders every

>> day report many cases? Why are these cases seen mostly in winter? Why

>> finches and not chickadees, nuthatches or woodpeckers? Does the finches'

>> habit of staying at a feeder for long periods contribute? Are finches more

>> susceptible to Salmonella? Are feeders really the source of overwhelming

>> Salmonella infections? Do sick Siskins get sick elsewhere and then

>> gravitate to feeders because of the easy food supply?

>>

>>

>>

>> Winter is a tough time for all wildlife, especially the very young who

>> haven't quite figured out how to make a living and the very old. A missed

>> meal during cold wet weather could mean a downward spiral. It is impossible

>> to identify a mildly sick bird because prey animals hide any sign of

>> weakness until they can't anymore. Those fluffed birds camped out at your

>> feeder are dying and likely cannot be helped.

>>

>>

>>

>> Since every bird already harbors Salmonella bacteria, it is my opinion

>> (and JUST an opinion!) that the birds that are dying from Salmonellosis

>> almost always have some preexisting condition that makes them more

>> susceptible to the disease. They may be malnourished, weak, unable to stay

>> warm, or have some other concurrent disease. The Salmonella takes over in

>> these situations and causes death. Our own bodies contain billions of

>> beneficial E. coli bacteria but if these organisms are in the wrong place

>> at the wrong time they can cause a serious infection.

>>

>>

>>

>> So, what about feeders as a cause of dying birds? Maybe, but I believe we

>> may save more birds by feeding them especially during the torrential rains

>> we are experiencing or when snow covers the ground. Again, this is

>> controversial and there appears to be no right or wrong answer. Should we

>> thoroughly clean our feeders? Definitely, fungal and other pathogens as

>> well as Salmonella, lurk in feeders. The frequency of cleaning is up to

>> you.

>>

>>

>>

>> I hope this has been food for thought. Definitely a lot of unanswered

>> questions!

>>

>>

>>

>> Happy New Year!

>>

>>

>>

>> Dave Parent DVM dpdvm at whidbey.com Freeland, WA

>>

>>

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>>

>

>

> --

> Dan or Erika Tallman

> Olympia, Washington

> danerika at gmail.com

>

> http://dantallmansbirdblog.blogspot.com

>

> ".... the best shod travel with wet feet...Beware of all enterprises that

> require new clothes ...."-;H. D. Thoreau

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