Zoo’s Mother’s Day surprise First calf for yak mum aged 11

      ZSL Whipsnade Zoo has welcomed its first yak baby in more than a decade, just in time for Mother’s Day. click here to see all the photos http://celebrityphotosuk.photoshelter.com/gallery/ZSL-Whipsnade-Zoo-Mothera-s-Day-surprise/G00000xJopVzcaQ0/   The four-week-old calf, who keepers have named Zak, was born in the early hours of February 8 and is an extra special arrival for […]