Well given than in Spain vultures are feeded by the remains of butchers, while in Portugal those remains are burned down(I believe), it is not a big surprise.

Well given than in Spain vultures are feeded by the remains of butchers, while in Portugal those remains are burned down(I believe), it is not a big surprise. I have seen them being feeded in mountains at the north of Spain called Picos de Europa: https://en.wikipedia.org/wiki/Picos_de_Europa https://en.wikipedia.org/wiki/Picos_de_Europa Laws change abruptly across boundaries, so it is not a surprise that vultures know when they are feeded or not. Birds or animals are not stupid. Animals that are hunted know exactly when the hunting season starts and ends. I have seen deer separate in sexes when the hunting ban expires(because the law forbids females to be hunted down), so you will see females with offspring completely relaxed in front of people.