Egg Laying, Hatching & Fledging Data 2012 – 2016

The 2016 season data is displayed below and will be added to as the season progresses.  Incubation days are calculated from the date of the laying of the final egg.   

(Timings are approximate to the nearest 5 minutes)

 Egg        Date laid    Time Laid   Date Hatched   Time Hatched    Date Fledged    Time Fledged     

1st          18 March    16.50           29 April              01.00                  9 June (43)      06.44 (Died 17.00)
2nd         21 March    04.55           29 April              03.50                 10 June (41)     21.00 (Died in July)
3rd          23 March    18.25           29 April              06.50                 13 June (YY)    05.21
4th          26 March    11.00           30 April              05.30                 13 June (42)     21.15 (Killed by GA)  

Egg        Incubation Days         Nestling Days

1st                  35                                42
2nd                 35                                43
3rd                  35                                46
4th                  36                                46

The 2015 season data is displayed below.  Incubation days are calculated from the date of the laying of the final egg. Unfortunately the 4th chick to hatch died a few days after hatching, this was due to natural causes but we are not sure why.  

Egg        Date laid    Time Laid   Date Hatched   Time Hatched    Date Fledged    Time Fledged      

1st          19 March     06:17           27 April              21:56                   9 June                  06.15
2nd         21 March    17:12            28 April              00:04                   9 June                  06.22
3rd          24 March    05:28            28 April              12:30                  10 June                 07.41
4th          26 March    Unknown     30 April              14:12       Died of natural causes   5 May

Egg         Incubation Days        Nestling Days

1st                  32                                 43
2nd                 32                                 42 
3rd                  32                                 43 
4th                  34                                 5 

 

One of our past dedicated volunteers for the Norwich Cathedral Peregrines, Dave Gittens, has compiled all the key egg laying, hatching and fledging data from the 2012, 2013 and 2014 breeding seasons.  

The information gathered together here shows how consistent the natural breeding cycles of the Norwich Cathedral Peregrines have become. The first egg is laid within a 4 day window, the first hatching and first fledging within a 6 day window.

ncp_2012_data

ncp_2013_data

ncp_2014_data

ncp_2012-14_keydates_data

The data above has been adapted for display on our website.  

If you would like to download the MS Excel spreadsheet that was developed to illustrate the data and fill in this years statistics as they happen, you can do so please Click Here