“The nilgai isn’t considered threatened on the IUCN Red List, given its abundant populations in India, Nepal and Pakistan (and introduced populations in the U.S. and Mexico). But in Bangladesh, the blue bull was declared extinct in the 1930s, nearly a century ago…
Now, however, their forays back into their historical habitats indicate that Bangladesh has room to once again host nilgais within its borders.”
From Mongabay.