Manitoba Peregrines > Radisson Peregrines
Radisson - 2011 / Ivy & Princess
The Peregrine Chick:
--- Quote from: Kinderchick on August 02, 2011, 23:21 ---
--- Quote from: The Peregrine Chick on August 02, 2011, 15:02 ---...Females disperse further than the males and in fact, more of our females survive to nest than males based on observations...
--- End quote ---
Interesting. Why do you think that is, TPC? Is it because more males fight to defend nestsites and are killed in action, so to speak? ???
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Its a usual dispersal pattern with birds, one gender tends to stick closer to the natal area, the other disperses further. With peregrines, females go further, males stay closer. Its the same with mammals. Don't know about reptiles, amphibians or fish. It allows for greater genetic variability within a population.
Kinderchick:
--- Quote from: The Peregrine Chick on August 02, 2011, 15:02 ---...Females disperse further than the males and in fact, more of our females survive to nest than males based on observations...
--- End quote ---
Interesting. Why do you think that is, TPC? Is it because more males fight to defend nestsites and are killed in action, so to speak? ???
The Peregrine Chick:
--- Quote from: Kinderchick on August 02, 2011, 12:39 ---So great to hear that the birds are still coming back to the nestbox at night. :D I was wondering, do you think that juvies who return to their nestbox often are more likely to make an effort to return, at least to the area, the following year, TPC? Have there ever been any studies done with regard to this? Did Ivy return often to his nestbox when he was a juvie here in Winnipeg? Or is there no way of predicting where a bird will end up? Is it more related to their pairing up with a particular partner?
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We rarely see previous years' chicks at their natal sites following fledging unless they are actually taking over the site (i.e., T-Rex, Trey, Ivy in Winnipeg and Zeus, Keener-Screech and Brooklyn in Brandon). Females disperse further than the males and in fact, more of our females survive to nest than males based on observations.
Ivy didn't return to Winnipeg until he paired up with Lucy in 2007. And no, there really isn't any way to predict who will end up where.
Kinderchick:
So great to hear that the birds are still coming back to the nestbox at night. :D I was wondering, do you think that juvies who return to their nestbox often are more likely to make an effort to return, at least to the area, the following year, TPC? Have there ever been any studies done with regard to this? Did Ivy return often to his nestbox when he was a juvie here in Winnipeg? Or is there no way of predicting where a bird will end up? Is it more related to their pairing up with a particular partner?
The Peregrine Chick:
Had a look at the playback from last night this morning and Carson turned up about 1730h yesterday for a little while then returned with a "friend" after 2000h when it was raining. Both birds came in near to each other on the ledge so I'm suspecting Carson and Cade even though we have seen Carson more often with Beatrix. Second bird (Cade?) took off right away, Carson came down the ledge to the ledge cam and was hanging out in the corner.
When it went dark I could see him moving on the ledge and onto the nestbox edge (2300-0200 approx) then back along the ledge until this morning when a second bird, which looked to be same size hopped on the ledge as well and the pair of them waddled off down the edge. Too wet to tell the colour on the second bird for sure but I think it was Cade again. Anywho, they toddled off down the ledge, "Cade" all the way to the nestbox edge and then Carson took off from the ledge and "Cade" took off after him a few seconds later. And yes, they left at their usual time - 0532h today.
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