Recently I was fortunate enough to see both Black-bellied and Pintailed Sandgrouse in the wild in Spain. On Zootierliste the only sandgrouse in Europe in a zoo are in Spain, with Pintailed Sandgrouse listed at el Escorial. I have found a reference to captive breeding of Black-Bellied Sandgrouse, and given their seed based diet they do not sound a species that would be impossible to maintain, so I was wondering the reason they appear so rare in captivity. Are there any in the US or Asia?