To update on this unexpected observation - the apparent smaller nestling has 
not been seen for several days now.  The larger fledglings seem to be in nearby 
trees most of the time and the adults do not seem to be attending the nest any 
more.  

Thanks to everyone who offered feedback on the situation.  Sorry I don't have a 
happier ending to report.
 -Peter

    On Saturday, May 9, 2020, 8:05:37 AM MDT, Scott <pygmy...@frii.com> wrote:  
 
  
Yes,
 
I have seen GHO's lay one egg every three days, and I have see them weight up 
to and over a week or longer to lay a second or third egg.
 
It will be interesting to see what the parents do with the owlets when the 
oldest owlets begin branching. But GHO's are very good parents for the most 
part.
 
 Scott Rashid
 Estes Park 

 
 On 5/8/2020 3:46 PM, 'Peter Ruprecht' via Colorado Birds wrote:
  
 
 Hi Cobirders, 
  I've been watching a Great Horned Owl nest near my house in Superior.  The 
nestlings are getting pretty big and starting to move out of the nest and onto 
nearby branches.  However, a couple nights ago I thought I saw a small fluffy 
white head sticking up among the much bigger other nestlings.  And then today 
someone sent me a photo which I think pretty clearly shows a young GHOW 
nestling (totally downy, maybe 2 weeks old at most) in there. 
  Has anyone ever heard of such an age difference in GHOW nestlings?  This is 
clearly not just the usual asynchronous hatching.  I thought perhaps the small 
one could have been brought in as prey from another nest but it seemed to be 
sitting up and alive.  I didn't see anything like this in a quick google 
search. 
  Thanks, Peter Ruprecht Superior
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