UV is in Africa

There wasn’t any data from UV’s GSM/GPS transmitter yesterday, an indication he might have left Portugal for Africa. The proof arrived today.

courtesy Paul McMichael

UV’s sea route is interesting. Compare it to 2016 – which was quite similar to his 2014 Autumn migration course.

courtesy Paul McMichael

The reason for the difference is the wind direction.

courtesy Paul McMichael

That was a forecast in the last post about UV, but is fairly accurate. UV left the coast at 11.19 UTC. The wind strength was about 25 km/hr and was taking him westward. But, because he knows where the coast of Africa is – unlike juveniles – he also knew that if he flew fast he would meet it. UV flew 127 km down-range between 12.00 and 14.00 UTC, very good going.

You can see a shift to a more southerly course in his route. This was at about 15.00. Compare the wind chart and his position when he changed course.  He found favourable winds for going south, so took advantage.

More statistics! UV flew 587 km yesterday in total. His sea crossing took from 11.19 to about 21.30. Here is his departure point from Portugal.

UV flew out to sea just past the end of the rocks on the right
courtesy Street View


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

6 Responses to UV is in Africa

  1. Sal Lloyd says:

    What a difference a day makes :-)

  2. Cirrus says:

    Ah, I should have read this Blog first. Big sigh of relief and thanks so much for all the info

  3. Jo says:

    Oh my goodness!! Wonderful news …… Thank you Joanna ……. :-))

  4. Vivien Finn says:

    Great news that UV has arrived safely in Africa. :)

  5. I’m curious about the why you’re saying that the much shorter over water leg from Spain to Africa was just down the wind. Everything I’ve read from Dr B in the States and Tim Mackrill’s PhD paper says that Ospreys tend to reduce the length of their over-water legs as they become more experienced. Isn’t that a likely assumption as well?

    • joannadailey says:

      The blog simply describes what UV is doing and attempts to interpret it in that context. It would be a mistake to draw wide-ranging and general conclusions from the behaviour of one individual bird on one single day. In principle, we try to avoid doing this.

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