Osprey Chat - May/June 2019

I am wondering how others calculate the laying to hatching date.

I have always regarded the following date after laying as Day 1 and add 37 days to that for the hatching date and am wondering if others calculate this way too or regard the laying date as Day 1.

Interested to know others' views.

Hi Karen. I've always viewed the day of laying as day 1. But given the variability in laying to hatch dates I've also used Chloe and Tiger's stats which give the history for any given pair of birds. I'm not sure if there's extra data for the last couple of years on any site?

Korky - thanks for the stats link but within the stats I can only see the history of the number of days not the day from when we start counting.

However, you have just reminded me that Chloe and Tiger used to do countdown clocks for I recall Tiger posting the clocks approaching hatching but I cannot find them. I wonder if they are still doing them and if so, does anyone have a link.

I'm not sure they are doing them anymore. I think last year someone else did one for one of the nests and indeed Tiger showed me how to do one but I never managed to figure out how to share it on this site.

Excellent! I am so pleased they are still doing them. Thanks Birdie for the link.

I just saw 25macs post on LG and thought worth bringing forward to here.

Osprey in unused 40 year nest

Oh the clocks are hidden away under the name  CLOCKS

In my signature there is a guide how to use imagicat to find webcams

See    Finding osprey webcams using imagicat

Karen W said:

I am wondering how others calculate the laying to hatching date.

I have always regarded the following date after laying as Day 1 and add 37 days to that for the hatching date and am wondering if others calculate this way too or regard the laying date as Day 1.

Interested to know others' views.

I have always regarded the day after an egg is laid as   Day 1 because that is when the egg is a day old.

If you count the day of laying as day 1  (and some people do) you invite large errors. For example if an egg is laid  at  one minute to midnight  it becomes two days old after a minute. That cannot be right.