Yes, Corvus Albus are also called Pied Crows - But are actually a type of raven -
Both of my pair were perchased from a friend of mine locally -
My birds are both CB, and I paid $950 for each of them - They usually run between that and up to around 1,200$ or more each, depending if they are wholesale or retail -
Yes, Hugin an Munin were trained as falconry birds, through alot of the same ways a hawk would be traied, but with a "light touch" as, they are much more fragile and a tad more "dificult" then training a hawk. Thier kind of like a cross betwen a Prarie Falcon and an Amazon Parrot - You have to real carefull when working a bird like this, as unlike a redtail hawk, and when they bate, are verry easy to injure.
They always have accsess to food while im not working them,(puppy chow, cut fruits and veggies and corn on the cob) But I use thier dailt fresh meat rations in training - Three to four Mice, Superworms, orange winged cockroaches, different meats and things like halved quail. They can not be kept healthy on dogfood and stuff alone - just like a hawk, they need fresh whole prey -
My pair has taken down red and grey squirrel, who were makeing a pest of themselves around my mothers property. I usualy course them after a red squirrel skin lure, and they take frogs and field mice, rats and house sparrows too - Grey squirrel is the absolute largest prey Id ever let them go for, as anything bigger would be much too dangerous. They are amazingly smart birds, and it astounds me how quick they learn, and figure out ways to take down prey -
Hope this has been helpfull - 
Raven -