Question:
Last year they spent all that time over on Midtown and there was no sign of a scrap or eggs. Is it possible that there could be something wrong with one of them that they can't produce any viable eggs? I hope not that would be a major bummer. I thought I read of a pair in Canada that doesn't lay viable eggs. That is what made me ask.
Good question. Although we didn't find evidence of a scrape or any eggs at Midtown, there is no proof that either Mariah or Beauty didn't lay eggs there. The spot they chose was little more than a gutter, so all evidence was probably swept away by the heavy rains that hit Rochester at that time.
Ranger, Mariah and Cabot-Sirocco's daughter, has been up in Toronto (and still is as far as we know) for many years and has laid eggs that have not hatched. Mark Nash told me that he believes that it was due to not chosing their nestsites wisely. But, who can say for sure.
So, I guess it's just a matter of patience. I believe Ei's records showed that Mariah did not lay eggs until 2-3 weeks after Kaver's arrival to Rochester. Keep watching those cameras!
Yes, my notes show an average of 22.57 days from first Kaver sighting to first egg. There was also this note posted by Donna re: Dori & Louie at Gulf Towers-Archer arived March 21-just 2 weeks ago.
At the Gulf Tower peregrine nest, Dori laid her first egg last night, Friday April 2, at 10:45pm. She laid it in the same scrape where Tasha, the former resident female, had laid her two eggs before she lost the site to Dori.
According to Birds of North America Online, for peregrines “completed copulations begin at least 2 wk prior to egg-laying.” Dori won the site on March 20 so my mental calculation had her first egg arriving two weeks later. This first egg is right on time – even a little early.
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Psst...who's gonna sneak up to the 10th floor & take possession of that office with TWO windows? I can be there on Thursday to relieve you... 
