Glaslyn Osprey Egg Statistics

Year Period from 1st mating to egg laying Incubation Period Comments
2005 1st egg 10 days 38 or 35 days
2nd egg 13 days Failed to hatch Probably egg 2 based on subsequent years.
3rd egg 16 days 38 or 35 days
2006 1st egg 11 days ? 37 days Laying date based on observations, due to camera failure
2nd egg 14 days ? 36 days Egg briefly spotted evening of 15th April, two eggs confirmed early the following day
3rd egg 17 days 35 days
2007 1st egg 12 days 37 days
2nd egg 15 days 36 days
3rd egg 18 days 35 days
2008 1st egg 12 days 38 days
2nd egg 15 days 36 days
3rd egg 18 days 35 days
2009 1st egg 15 days 37 days
2nd egg 18 days 35 days
3rd egg 21 days 35 days
2010 1st egg 16 days 37 days
2nd egg 19 days 36 days
3rd egg 22 days 35 days
2011 1st egg 13 days 37 days
2nd egg 16 days 36 days
3rd egg 19 days 36 days
2012 1st egg 14 days 37 days Egg believed to be laid 3rd April, not confirmed until 10.02 the following morning.
2nd egg 17 days ? 36 days
3rd egg 20 days ? 35 days Nest cup built high and three eggs first visible 14.45 11th April.
2013 1st egg 13 days 37 days
2nd egg 16 days 36 days
3rd egg 19 days Failed to hatch Likely to be the third egg based on previous years.
2014 1st egg 14 days 38 days
2nd egg 17 days 36 days
3rd egg 20 days 35 days
2015 1st egg Laid 20th April 19.25. Not incubated, disappeared from side of the nest during squirrel visit.
2nd egg Laid 24th April 06.00. Broken by female.
3rd egg Laid 28th April 05.50. Taken by crow when female left to fish.
4th egg Laid 1st May 17.52. No attempt to incubate. Broken and eaten by male on 7th May.
5th egg Laid 4th May 06.55. Initially incubated, then left uncovered. Hole discovered 9th May, broken by male 10th May.
6th egg 18 days 36 days Laid 18th May
7th egg 23 days 35 days Laid 23rd May. On 4th June knocked out of nest cup accidentally by male at 5pm, he returned it at 04.35am (11.5 hours later).
2016 1st egg 6 days Failed to hatch Laid 18th April. No real incubation by female, although male attempted. Buried under nesting material on 19th April.
2nd egg 10 days 36 days Laid 22nd April. Incubated by both birds from the start.
3rd egg 14 days 34 days Laid 26th April

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A comprehensive summary of Glaslyn Osprey statistics in .pdf format can be downloaded here.