Dates are very important in nature.
Ospreys are migratory so timing is crucial in terms of getting back to the UK in an optimal time to achieve the best breeding productivity. Get back too early and risk a cold spring with food hard to come by and few other ospreys around; get back too late and all of the nest sites and breeding birds are spoken for.
The further north in the Europe ospreys breed the later they tend to come back - for obvious reasons. Ospreys in France return in February and early March whereas those birds breeding in northern Finland may not get back until April.
Here are all the key dates corresponding to significant milestones since the Dyfi ospreys started to breed:
Note: these dates are published at the back of the DOP Calendar each year - look out for them in the online shop from the autumn onwards (EDIT: Shop open October 2016)
*Blue 24 laid three eggs in 2016 on the second nest platform on Cors Dyfi. She, nor the eggs, received patertnal investment and all the eggs were predated by crows approximately 10 days after laying.