We have been following 12-year-old female osprey 30(05) since she had her satellite transmitter fitted in 2013. Since then, she has migrated south to Senegal four times, and back north again four times! Thanks to her satellite tag, for each of these migrations we have been able to map her journey using Google Earth, in order to learn what we can about osprey migration. We have discovered many interesting things from studying the data from 30’s tracker. She always winters in exactly the same spot on a beach in Senegal, and uses the same perches every time! Wintering ospreys have a territory during the winter which they will defend from other birds. 30 also takes a very similar route each time, it seems ospreys remember the way they went previously and try to stick to the same route.
This season, 30’s migration took her 20 days. She set off from her beach on 11th March, and began to travel up the coast of Africa. 30’s route took her through Morocco and across the Mediterranean at the Strait of Gibraltar. She then went right through the centre of Spain and along the West coast of France, until she moved slightly north-east in order to cross the English Channel at the narrowest point. She arrived in Rutland on Friday 31st March, after travelling a total of 3,018 miles!
30’s record migration time is 11 days. She was slower this year due to bad weather in France, we believe, as she slowed down significantly whilst there, only travelling a few miles per day. Whilst in France, 30 spent a day at Château de la Roche Courbon – a French chateau with an enormous ornamental lake and gardens, which is open to the public. She even perched on one of their statues! I wonder if any of the visitors saw her?
Here is a map of her journey: