Hi there Burra Maluca, since you're portuguese, I draw your attention to a similar
project in the Douro/Castelo Rodrigo region, The Faia Brava natural reserve (can also look under Associação Transumância Natureza).
They now manage 875 ha of
land, almost contiguous to the Douro Internacional Reserve (privately owned!).
They are rewildening these lands. They also released (1 or 2 years ago) a herd of horses, Garranos, quite similar to the Retuerta ones.
They also have been releasing wild animals. For years the rabbit's population (as you know rabbit, partridges, fox, wolf, vulture and boars are
local species) is slowly growing. (They've locked some areas from hunting and there has been way less use of fire by the shepherds. This
led to an increase of predators population as well (You can tell by 3 dead foxes seen on the road this year).
http://www.atnatureza.org/