Forty days now since the first egg appeared on Nest 1 and still no hatching. Generally hatching is within the period 37-39 days, but can be up to 42 days after laying. There is no obvious reason for a late hatch, or no hatch; the eggs were incubated well with few absences from the nest during nestcam streaming hours, we didn’t see any ‘accidents’ by YA or his mate where an egg could have been cracked and there were no crow incidents such as the one at Loch of the Lowes where an egg was taken. The weather hasn’t been too bad throughout incubation. Mrs YA was probably a new breeder judging by her behaviour last year and because of nestcam problems just before eggs were laid we don’t know how long the incubation period lasted then. So we have no track record to consult.
Throughout the day the eggs were shuffled very frequently – once it was 5 times in 10 minutes – and although Mrs YA went away with a fish for a time leaving YA on the eggs she brought the fish back to the nest when she returned.
No hatching on Nest 2 either, although we don’t know the exact days of laying. In 2012 and 2013, the first egg was laid on 26 April which it may have been this year. Hatching was on 3 June 2012 and 4 June 2013.
Mrs 37 was on the eggs for well over an hour before the first turn of them today. 37 brought a large fish to the nest at about 11.00 and she went away with it.
37 incubated for an hour before she returned with considerably smaller remains! He also sat on the eggs for over 1.5 hours in the afternoon.