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Thread subject: Dennis' nest
Name Date Message
Nancy L 03/29/05 09:17 pm My husband & I took a walk at the ocean --rollers galore!! On the way, we stopped at the marina at the end of Beaver Dam Road, to check out our nest. Of course, I forgot my GOOD binoculars. There was an osprey up on the perch, but no other action around. That was around 3:00. The new "wheel" platform is still empty.
My husband has a theory about Dennis' winged-out posture at the edge of the nest. He thinks that Dennis thinks he appears a larger bird to others who might be interested in his nest. What do you think?
Matt 03/29/05 09:26 pm Nancy, there is truth in that. Most male mammals will try to appear larger or show how big they are to scare off other males. I really haven't paid attention to whether birds, geese, hawks or the like do that, but it does make a lot of sense.
Cecilia 03/29/05 10:22 pm It could be that or it might be that he is trying to make himself look big to her...to impress her. My pet cockatiels puff up and spead their wings out when they're excited and want to show off. They can make themselves look a third bigger than normal.

Poole mentions the mantling only in relation to new males hiding food but we've seen this Dennis do it a number of times when he isn't hiding anything. It's almost like he wants Betty to come over and see what he's got.

There is a lot of facinating information in Poole's book but I've been noticing, as I re-read it this year, that we have had a much better opportunity to witness nest behavior than he ever had, given the limitations of binoculars. I think one of the DPOF people told me that he is still alive so I keep hoping that he might revise the book and include all of the new information that is available now as a result of a number of bird cams!
Celeste 03/30/05 05:30 am It has also been mentioned that the male will do that stance when copulation is on their mind. And yes Cec, I have been thinking of Poole's book too, wondering if he would revise any of his findings now that there are so many up close and personal looks at these nests.

Copyright © 2006 DPOF

Tom Throwe
Last modified: Sat Feb 18, 2006