Re: Photo Phriday 38
[Re: Line Jumper]
#7566231
04/22/22 08:48 AM
04/22/22 08:48 AM
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Joined: Jan 2009
Posts: 2,666 Idaho, Lemhi County
Gulo
OP
"On The Other Hand"
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OP
"On The Other Hand"
Joined: Jan 2009
Posts: 2,666
Idaho, Lemhi County
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Cool pictures, talk about stacking the prey up. You would think it would get pretty rank in that nest box. The adult female basically sits in the box for 1.5 months. She leaves the box for a couple minutes each day to cast and defecate. The male, on the other hand, is busy hunting for himself, for the female, and for the youngsters. He's a busy boy. Before hatching, he generally supplies more than can be consumed, so yes, the prey stacks up in the box and does sometimes get a bit rank. By the time to oldest chick is a week or ten days old, however, most of the prey is usually consumed. That relatively short period with stacked up prey is generally when the nest cavities are "discovered" by predators. I've documented predation of the owlets by marten, lynx, and black bears. Jack
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Re: Photo Phriday 38
[Re: Gulo]
#7566248
04/22/22 08:55 AM
04/22/22 08:55 AM
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Joined: Dec 2006
Posts: 62,661 Minnesota
330-Trapper
trapper
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trapper
Joined: Dec 2006
Posts: 62,661
Minnesota
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Cool pictures, talk about stacking the prey up. You would think it would get pretty rank in that nest box. The adult female basically sits in the box for 1.5 months. She leaves the box for a couple minutes each day to cast and defecate. The male, on the other hand, is busy hunting for himself, for the female, and for the youngsters. He's a busy boy. Before hatching, he generally supplies more than can be consumed, so yes, the prey stacks up in the box and does sometimes get a bit rank. By the time to oldest chick is a week or ten days old, however, most of the prey is usually consumed. That relatively short period with stacked up prey is generally when the nest cavities are "discovered" by predators. I've documented predation of the owlets by marten, lynx, and black bears. Jack Super interesting stuff
NRA and NTA Life Member www.BackroadsRevised@etsy.com
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Re: Photo Phriday 38
[Re: Gulo]
#7566289
04/22/22 09:32 AM
04/22/22 09:32 AM
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Joined: Dec 2012
Posts: 870 Northern WI
Line Jumper
trapper
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trapper
Joined: Dec 2012
Posts: 870
Northern WI
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Cool pictures, talk about stacking the prey up. You would think it would get pretty rank in that nest box. The adult female basically sits in the box for 1.5 months. She leaves the box for a couple minutes each day to cast and defecate. The male, on the other hand, is busy hunting for himself, for the female, and for the youngsters. He's a busy boy. Before hatching, he generally supplies more than can be consumed, so yes, the prey stacks up in the box and does sometimes get a bit rank. By the time to oldest chick is a week or ten days old, however, most of the prey is usually consumed. That relatively short period with stacked up prey is generally when the nest cavities are "discovered" by predators. I've documented predation of the owlets by marten, lynx, and black bears. Jack Thanks for feedback Jack
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Re: Photo Phriday 38
[Re: Gulo]
#7566339
04/22/22 10:25 AM
04/22/22 10:25 AM
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Joined: Dec 2006
Posts: 11,005 Oregon
beaverpeeler
trapper
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trapper
Joined: Dec 2006
Posts: 11,005
Oregon
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Great pics! Very interesting.
My fear of moving stairs is escalating!
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Re: Photo Phriday 38
[Re: Gulo]
#7566481
04/22/22 01:55 PM
04/22/22 01:55 PM
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Joined: Mar 2011
Posts: 11,441 Montana ,Rocky Mtns.
Sharon
"American Honey"
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"American Honey"
Joined: Mar 2011
Posts: 11,441
Montana ,Rocky Mtns.
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Wonderful shots, Jack. Always love reading and seeing your research and observations, in your eyes, expressed. That last shot of that youngster is so cute Thank you for sharing.
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Re: Photo Phriday 38
[Re: Gulo]
#7566507
04/22/22 02:20 PM
04/22/22 02:20 PM
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Joined: Dec 2006
Posts: 3,489 Moved to Fbks, Ak.
martentrapper
trapper
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trapper
Joined: Dec 2006
Posts: 3,489
Moved to Fbks, Ak.
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Nice pics. Informative. Looks like the first pic those are all red backs? Was this study around McGrath? My first years of marten trapping along the lower Nowitna were all ground cubby sets. Probably caught 3-4 boreals a year plus an occasional gray. We called the boreals "hawk owls". Made gray owl soup once. Wasn't that good. The owlets leave the nest before they can fly? Owl numbers must rise and fall with vole numbers, like marten?
Last edited by martentrapper; 04/22/22 02:22 PM.
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Re: Photo Phriday 38
[Re: martentrapper]
#7567306
04/23/22 10:26 AM
04/23/22 10:26 AM
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Joined: Jan 2009
Posts: 2,666 Idaho, Lemhi County
Gulo
OP
"On The Other Hand"
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OP
"On The Other Hand"
Joined: Jan 2009
Posts: 2,666
Idaho, Lemhi County
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Nice pics. Informative. Looks like the first pic those are all red backs? Was this study around McGrath? My first years of marten trapping along the lower Nowitna were all ground cubby sets. Probably caught 3-4 boreals a year plus an occasional gray. We called the boreals "hawk owls". Made gray owl soup once. Wasn't that good. The owlets leave the nest before they can fly? Owl numbers must rise and fall with vole numbers, like marten? Yeah, I think all are red-backs with the exception of one that is a root vole. I had study boxes around Glennallen in the early 80s, then a couple hundred around McGrath from late 80s to late 90s. Then a couple hundred more boxes around Fairbanks (Steese, Elliot, Standard Creek, Etc.) from 2003 to 2008. Yes, the owlets generally leave the box a couple days before they can actually fly. They're called "branchers". I think yes, the annual production of owlets largely depends on vole numbers. Like the marten production in the interior, the owls subsist mainly on red-backs, although other species (root voles, singing voles, meadow voles, yellow-cheeked voles) are taken as well.
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Re: Photo Phriday 38
[Re: Gulo]
#7567798
04/23/22 07:59 PM
04/23/22 07:59 PM
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Joined: Jan 2009
Posts: 2,666 Idaho, Lemhi County
Gulo
OP
"On The Other Hand"
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OP
"On The Other Hand"
Joined: Jan 2009
Posts: 2,666
Idaho, Lemhi County
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Northof50 -
I used my personal Master Banding Permit for all the owl banding, but have since gone inactive on that permit. I should re-activate and request all the return data from the banding lab. During the time I was actively working on owls, I periodically captured birds as adults that I had banded in previous years as fledglings. Also, very infrequently, I captured adult females in subsequent years as breeders in different boxes. As far as returns from "other" sources, I have no data there.
Jack
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