Honestly, please take it from an antelope specialist man ... the ones you are talking about in light brown are the female nilgai. They really are a common sight in places like Spain and Italy (esp. in the open range semi-arid environments as on Mallorca).
Having been on Zoochat for almost three years and read very many of your posts, I have no reason to doubt you, K.B. Thank you (and Maguari) both for your help!