I am sorry to have to report that it looks like we have almost certainly lost Nethy, our female chick from last year.
We received an incomplete data set two weeks ago, giving Nethy’s position next to a river in a remote part the West African country of Guinea Bissau. It showed no movement, but the timings of the two fixes we had, on each of three days, were the same, at 8 am and again at 4 pm, so we thought that maybe she was returning to roost in the same spot, a favourite tree perhaps.
The data set though, was incomplete – with so few fixes, there was little to report. The satellite might not have picked up Nethy’s signal very effectively. She could have been perched in a shady tree for example, effectively shielding her somewhat from any satellite pass.
This is what we hoped but we needed better data to be able to draw any firmer conclusions. On Monday this week, we received the latest and more complete data (up to 20 March) and it revealed that the signal coordinates were coming from the same place between 11 and 20 March. No movement from her for two weeks now would appear to say it all, I am afraid.
We can tell that the battery voltage is now very low, presumably not in sunlight and therefore not being re-charged. There is just an outside chance that her tag might have fallen off, but we will never know for sure. Until such time, as she returns to Scotland and is identified from her leg rings, the best we can say is Nethy is missing in action, presumed dead.
This is very sad news indeed, and given the loss of first Deshar and now Nethy, it brings into sharp focus, just how precious each and every young osprey to be reared in Scotland in any year, is to the future of the Scottish osprey population.
Every year we bid farewell to our departing ospreys, as they head off on migration to Africa, until now, never quite knowing what becomes of them, but the tracking project has at least enabled us to find out, the albeit sad news, that many don’t make it, but we are learning a bit more all the time. The BTO reckon that 40% of ospreys die in their first year…
As we enter a new season at Loch Garten - the Osprey Centre opened yesterday(!) with EJ back awaiting a mate, lets hope we have a successful season ahead.
I have not told the Osprey team yet. I’m off to do that right now.