Asteria
Black Storks can also fly with crosswind.
They do not necessarily need tailwind to fly (although it is nice and fast for them).
The only wind they do not like to fly in is (strong) headwind. That is a waste of energy.
And yes, hibernating frogs hardly move at all, so they may seem easy to catch. But one has to be able to find them first! Aquatic frogs hide at the bottom of water bodies when it is cold. Frog species and toads that spend most of their time on land will usually burrow down below the frost line in burrows or cavities.