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pokerfan

(27,677 posts)
Mon Jan 30, 2012, 09:07 PM Jan 2012

Snowy owl sightings soar



Denver Holt, head of the Owl Research Institute in Montana, has studied snowy owls in their Arctic tundra ecosystem for two decades. He told Reuters:

What we’re seeing now – it’s unbelievable.

This is the most significant wildlife event in decades.

For the real snowy owls, researchers say the drive for food is likely behind their increased migrations south. They observed that snowy owls have hatched unusually large clutches last season, up to seven owl chicks compared to the more normal two.

http://earthsky.org/biodiversity/snowy-owl-sightings-soar


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mike_c

(36,281 posts)
2. must have been a good year for rodents to support those high clutch sizes....
Mon Jan 30, 2012, 09:12 PM
Jan 2012

Unfortunately, there's a pretty cruel thing that happens at the top of those population cycles.

 

Marnie

(844 posts)
4. The question is, with the tundra melting and warm weather taking up more days of the year further
Mon Jan 30, 2012, 09:33 PM
Jan 2012

ward, why are the owls moving south?

At the same time seasonally southward migrating birds are over summering further north than usual in recent years.

It would seem that the owls would be finding more rodents and small mammals northward, and there is less competition from other more southerly owls, and mammal predators. Are they praying on migratory birds that are over summering further north?

semillama

(4,583 posts)
10. The owls are moving south because they are getting kicked out of the territory of older owls
Thu Feb 2, 2012, 01:12 PM
Feb 2012

These owls we are seeing here are victims of their own success; many of the young birds are starving to death due to a combination of inexperience and being in an unfamiliar habitat. Others seem to be doing fine, though. I've seen two of the snowies reported here in Ohio; one was found starved to death and the other is still hanging around the Ashtabula harbor.

If you get a chance to go see one, do it! magnificent birds!

Yo_Mama

(8,303 posts)
11. Population explosion producing emigration of surplus population
Wed Feb 8, 2012, 01:52 PM
Feb 2012

They can't go further north, so....

mopinko

(70,127 posts)
5. haven't seen one myself, but understand that there are some
Tue Jan 31, 2012, 12:01 AM
Jan 2012

in chicago. not that unusual for lake michigan shores.
got to get out there.

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