Sentence:  Almost all of these antelope communities have been reduced to scattered remnants by excessive hunting in the past and loss of habitat to agricultural development, but the <WSD>bluebuck</WSD> is the only antelope species which has been exterminated. 
Meaning of the word marked with <WSD> tags:  An extinct mammal, (noshow=1), the first large African mammal to become extinct in historical times ("circa" 1800).