UV turns back!

The last update was from data before noon on 25 January when UV was flying down the coast of Senegal south of St Louis after roosting near Rutland Water 30(05)’s winter home. This morning UV wasn’t far away from her again. He carried on south on 25 January to near Dakar but turned north again yesterday! Paul’s weather analysis did not identify any weather-related reason to prompt a turn around – this has happened in other migration this year.

There was some overlapping of the routes and on Google Earth UV’s path looked confusing. So a big thankyou to Paul for sharing some images created on his software. The first one shows UV’s routes over the two days.

UV explores towards Dakar. And back again!

UV explores towards Dakar. And back again!

Another of Paul’s graphics shows how on the first day UV flew at quite high altitudes on several occasions when a bit inland, checking out the habitat in pastures (although not many of those!) new.

The dark extensions to ground show well UV's altitude changes Image courtesy Paul Wildlifewriter

The dark extensions to ground show well UV’s altitude changes
Image courtesy Paul Wildlifewriter

Paul determined that UV travelled 150 km on 25 January at an average flying speed of 18.6 km/hr; on the trip back he covered 102 km at an average speed of 14.6 km/hr sticking much more to the coast.

UV’s overnight roost on 25 January was near Lake Retba, a unique natural lake of very high salinity and where the water appears pink from an algae Dunaliella salina.  Here is a view from the air by Chris.

Lake Retba (c) Chris Wood

Lake Retba
(c) Chris Wood

The image below (not to the standard of Paul’s!) shows UV had a look at it.

UV roosts near Lake Retba

UV roosts near Lake Retba

But he had probably caught a fish in the sea just off top right of the image because he spent  about an hour and a half in the area with all the fixes, mainly stationary although not for over 20 minutes or so per roost.

UV’s journey along the coast was apparently uneventful. Late afternoon yesterday he had a good look around the area he chose for overnight.

UV determines where to spend the night (courtesy Paul Wildlifewriter, arrows from JD!)

UV determines where to spend the night
(courtesy Paul Wildlifewriter, arrows from JD!)

He didn’t settle on his final roost point until 20.35, having been SSW of it from 18.25.

Today the data arrived just as UV had left the roost and was over the sea. He could stay or move, go south again or north… Bated breath for tomorrow’s download!

 

This entry was posted in Blue UV, Migration, Osprey updates and tagged , . Bookmark the permalink.

One Response to UV turns back!

  1. KEITH ROGERS says:

    Dakar peninsula next – then down to The Gambia ????????? – Who Knows.
    Well I called that one wrong on your last blog. Maybe too crowded for him – would love to be in his head for a wee while to know what they think. I am sure you feel the same.

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