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Contracted Datana - Hodges#7906 (Datana contracta)
Photo#1773630
Copyright © 2020
jim sogaard
Datana perspicua? -
Datana contracta
-
Pine Brook, Isanti County
June 30, 2001
Size: WS (pinned) 39 mm
While I suspect this is perspicua, I'm not sure. Thanks in advance for any assistance.
Images of this individual:
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Contributed by
jim sogaard
on 24 January, 2020 - 2:07pm
Last updated 25 January, 2020 - 7:29am
Moved
Moved from
Datana
.
…
jim sogaard
, 25 January, 2020 - 7:29am
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I Disagree
Certainly impressive spots but another
Datana contracta
in my opinion. The speckles stand out too much and the coloration is not uniform enough for
Datana perspicua
in my (still) too limited experience. That said I do wonder how some of the noted contrast might be due to slide film.
But are you secretly trying to sell me sumac bushes?
…
George Smiley
, 24 January, 2020 - 5:19pm
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George, Added image
Curious to see if less contrast changes your mind. Still looks pretty speckled, though.
…
jim sogaard
, 24 January, 2020 - 6:54pm
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Again Thanks
These photos from slides are quite tricky. Since some of my slides are underexposed and/or color-caste (I avoided flash photography of adults, much preferring ambient lighting for several reasons, which could and often did, go quite wrong), they require digital corrections in and of the scan, and try as I do, lots of room for control = lots of room for error.
I'm very much (once again) on a learning curve with Datana and much appreciate your assistance.
My sumac stock is presently frozen in the ground but come spring I will announce my new very special sale prices!
By the way, have you seen declines in Datana in TX as we seem to have up in the Midwest over the past decade or two?
…
jim sogaard
, 24 January, 2020 - 6:22pm
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No, But Special Case
I was asked by a scholar working on Notodontidae if I would be willing to rear
Datana
from any eggs I might encounter and since I was utterly lost understanding the adults I did just that. Turns out
Datana
eggs are pretty easy to find if you go looking for them and fairly easy to rear if one has the time so I ended up with a great number of adults. Some were sacrificed for science but the rest were let free right outside my door (often when trying to take their photo). I had also planted a number of trees and shrubs over the same time frame so predictably the
Datana
have thrived. 2015 - 2018 they completely defoliated most of the recently planted trees. This fall they left some leaves, but the trees themselves have grown and many a Yellow-billed Cuckoo was spotted.
I have noticed that the balance of power has shifted somewhat. It was quite hard to find
Datana ministra
in 2014, but now they are encountered equally often as
Datana contracta
. A direct result of the above I think.
…
George Smiley
, 24 January, 2020 - 7:33pm
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Glad to hear of your travails
Up here Datana seems fairly convincingly declined. No hard evidence, but only quite occasional at lights compared with years back. They never have showed up in numbers, though.
Back when I was a boy among the corn fields of south central MN I remember my grandma burning (!) masses of 'worms' from our three black walnut trees. I never knew of many (any?) walnut trees anywhere else nearby and yet Datana integerrima still found ours. And yet neither MPG nor BG maps nor SCAN maps yet show that species recorded in MN! What do/don't we know?
…
jim sogaard
, 24 January, 2020 - 7:49pm
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