Sea change

The last few posts about UV described his quite settled existence. He has no fixed routine -spending different amounts of time in several places – but he uses familiar spots and he can sit for hours! Just like most over-wintering ospreys.

On Wednesday UV flew further south than he has done since arriving back in Senegal. At his most southerly point he was offshore near the area that was his home for several months in 2015.

Familiar territory

Familiar territory

Yesterday UV was back there and went further, higher and for longer! He was in the air for around 2.5 hours with a 3 minute break perched on a tree by the river. His maximum altitude was 1036m ASL. Especially when over the river UV could have been hunting. But about 40% of the time he was over 150m ASL, far too high to see fish especially as the water is not clear. Perhaps UV was observing where other birds were hunting given he hasn’t been flying over the area recently. Whatever the reason for his behaviour it is interesting data.

It’s impossible to capture UV’s activity in an image. Paul has spent hours, literally, creating an animation of UV’s outing. UV’s altitude is shown at each point of his journey. Click to follow his route.

play

 

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

5 Responses to Sea change

  1. JW4926 says:

    Gosh ….. what fabulous graphics Paul ….. it’s brilliant imagining UV at each one of these points …. Thank you for this update Joanna – has he been physically ‘spotted’ out there yet?

  2. Cirrus says:

    What a totally amazing map!!!! Wonderful. Thank you so very much Paul… it was possible to ‘be’ with UV as he was hunting. I think he was successful at the end ? was that a ‘dip’ into the water for a fish do you think?

    • On this occasion, we can’t be sure if UV caught a fish or not. Normally, we deduce this from his subsequent behaviour (perching to eat the fish), and also from temperature changes in the telemetry if he plunged-dived to catch it. However… the water in that area is quite shallow, and ospreys may often be able to catch fish at the surface without a full immersion plunge. (This may be why they favour that zone for hunting.) Surface captures do not involve the revealing temperature change, so they leave us guessing. :)

  3. Vivien Finn says:

    Thank you for the update, Joanna. Fantastic graphics Paul, UV’s exploration and hunting clearly defined and great to see, thank you.

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