I saw this Corvus ruficollis and its partner on my recent trip into the Sahara desert. According to the IUCN website, the population is increasing. However, according to the same website numbers of mature individuals is unknown. Science needs to be based on facts, not wishful thinking. https://www.iucnredlist.org/species/22706064/118783085#population Many thanks to the excellent birders on birdforum.net for their help with the ID.
This Corvus cornix was looking for food on the banks of the Danube in Austria where I saw it a couple of years ago. The species used to be seen as part of Corvus corone (Carrion crow) but was given full species status in 2002. Danger to the birds comes from gamekeepers and similar numpties who hunt them.
Corvus corax is an amazing bird. I saw this one in the Lion Mountains near Oran, but the species is fairly widespread in the Northern Hemisphere. Major threats are habitat loss and stupid people who think culling these intelligent corvids would actually be good for the planet.