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San Jose Nest Diary 2013:

May 18: Fledge watchers celebrated the successful fledging of all three young during the prior week and a half. Many gathered on the roof of the Fourth Street Garage at 4th and San Fernando to watch adult and juvenile falcons tear up the sky during the evening.  Fledging was interesting as always--each youngster was replaced to the roof of City Hall after being briefly grounded by poor landing attempts. 

May 9: The red-banded young, 90/P was returned to the roof of City Hall on May 7 and is doing fine. He is not on the nest ledge but the parents are delivering food to him. His brothers will soon follow him by flying to one of the many convenient perches on the building.

90/PMay 5: The red-taped nestling, 90/P was exercising his wings on the ledge today when a gust of wind carried him away and he fluttered safely to the ground. An alert citizen called San Jose Animal Services and the youngster was spirited away to the wildlife animal shelter where we promptly caught up to him. He will be re-united with his family when the unusually windy conditions subside. The "normal" fledging period for males begins at 41 days-old or Saturday May 11th.

April 23: Three male falcon nestlings were banded at 23 days of age today. Fledging will occur about May 11.

April 4: Three of the four eggs hatched on Sunday March 31 and Monday April 1 but one unhatched egg remains in the nest. We plan to band the young on April 23 at about 7:30 a.m.

HatchedApril 1: We could clearly see a pipped egg on the morning of March 30 with movement by a white chick visible inside the opening in the egg. The egg hatched by 6:30 on March 31. Two more hatched overnight and all three were seen being fed at 8:30 a.m. April 1.

March 21: Incubation has proceeded without incident. We expect hatching to occur about March 29 or 30.

March 4, 2013: Incubation is underway for a full set of 4 eggs. We should be able to see signs of hatching by March 29. Hatching is difficult to discern because the female will continue to stay on the nest almost full time for at least one week after hatching except to feed the young.

February 24: The third egg arrived today and with it hard incubation is likely to begin. Hard incubation, or the period when eggs are brought up to incubation temperature ~ 99 degrees fahrenheit, and kept there until hatching, generally begins with the arrival of the third egg. Some speculate that the sensation of having three eggs in the nest stimulates the falcon to incubate. The arrival of the fourth egg about two days after hard incubation begins means that it will hatch a day or so after the other three. If food is scarce the fourth hatchling will soon perish. Incubation takes about 33 days.

February 19First Egg: 5:12 p.m. Clara lays the first egg of the season at the San Jose City Hall nest box.