(Portland, OR)  --  The Oregon Zoo is moving to spring hours and offering discounted tickets this week.  Adult tickets are 13 dollars through March 7th.  The zoo is now open from 9:30 a.m. to 5:30 p.m.  Tickets need to be purchased online.  Tula-Tu, the new baby elephant, can usually be seen in Forest Hall from 10 a.m. to 2 p.m.