It seems Victor might have had an interesting flight over the desert. He started his crossing in a southeasterly direction but about a third of the way into the desert he began heading west and continued on this track all the way to Burkina Faso and the southern edge of the desert. Burkina Faso has been his staging area for the last two years, in 2017 he arrived here on 19 Jul and on 1 August in 2016.
It is interesting to look at the winds during his crossing. For the first part, when he was heading east, he was flying into a light headwind coming from the southeast, roughly at the point he started heading west he met a light headwind coming from the southwest. We know that birds prefer to fly into light headwinds, doing so gives them a greater degree of control over their flight than a tailwind would, but it is great to see this in action. Of course if the headwind is too strong birds will sit it out until conditions improve.
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