UV goes south. Again

The data on UV today was only until lunchtime, but by then he was nearly as far south in Senegal as he has been to date.

Yesterday he spent the afternoon in the Langue de Barbarie area, travelling north mainly up the eastern side of the long peninsula. Just after sunset UV was roosting inland in the wetlands created when the peninsula was breached as flood prevention for St Louis to the north. But that wasn’t his final roost; he flew about 35 km south in decreasing light, arriving at an overnight roost at about 20.00 GMT.

Today he was on the move at daybreak flying over the sea but stayed in the vicinity of his roost until after 11.00 when he headed…. south.

He flew past Rutland Water 30(05)’s area late morning, again avoiding it.

UV flies past 30(05)'s territory at height

UV flies past 30(05)’s territory at height

He carried on down the coast often at speed which was helped by a variable tail wind – N at 12-14 knots (that is 22-26 kph) – and at altitudes of up to around 500m ASL at times.

By the last fix at just after 13.00 he was about 60 km north of his most southerly overnight roost near Lake Retba on 25 January.

UV's travel from 13.00 oon 29 Jan to 13.00 on 30 Jan

UV’s travel from 13.00 oon 29 Jan to 13.00 on 30 Jan

The comparison of the ‘ups and downs’ of UV’s recent travel is difficult to illustrate, but Paul has made a valiant effort which is as clear as can be achieved. Thanks to him for this graphic. Click to enlarge it and see the helpful arrows.

UV travel 25-30 JAn

UV travel 25-30 Jan

Juvenile ospreys tend to meander about to establish a territory but actually until  now UV has not exhibited this. He arrived in SW Portugal and stayed in one small area albeit with some day trips. At the Gulf of Cintra he remained near at the north end with one excursion for a few days to the south of the bay. Now he is back and forth. One could speculate that possibly he is in good habitat a few weeks too early. 30(o5) will not be the only experienced osprey along the stretch of coast. Although there is no evidence that he has been ‘chased off’ from anywhere. Maybe he is looking for something more like a Portuguese reservoir and he won’t find that!

The prevailing winds need to change direction before the breeding ospreys will leave for Europe and those same winds will constrain UV’s options. Whatever he does next it won’t be flying back to Portugal.

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

3 Responses to UV goes south. Again

  1. Vivien Finn says:

    Many thanks for this report Joanna and also Paul for the helpful graphics. I think it will be a great relief to us all when he establishes his own fishing area. However as you mentioned, that might be a few weeks away yet.

  2. KEITH ROGERS says:

    Dont mind him being chased off for a few weeks until the adults leave if that is the case as long as he is catching his daily allowance. It is all part of an ospreys learning curve and the ability to survive.

  3. joannadailey says:

    Thanks, Viv and Keith, for the comments. It does seem as if it may take time for UV to get a home patch. I’m not sure he is being ‘chased off’ but he could be, given the area.

    The GSM trackers provide a fantastic insight but the 1-2 min fixes at peak times makes an analyst greedy for more at others! Early morning there is usually a 40 min interval between fixes (even so that is better than traditional trackers) and that is when a fish may be caught. Combining activity data with engineering data ie the temperature of the tracker can sometimes help pinpoint when fish are caught and there are possibles for UV between 07.00 and 08.00 several days recently. Plus one at least at Langue de Barbarie.

    Given his speed/altitude at times he appears to be coping well even though he has no set territory.

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