Two pygmy marmosets were born on Nov. 14, and make their official debut Wednesday at the Houston Zoo. HOUSTON – The Houston Zoo brought twice the good news as two pygmy marmosets made their official debut Wednesday. The two babies were born on Nov. 14, to 7-year-old mom, Teek, who is also a first-time mom, according to the zoo. Zoo officials said the pygmy marmoset family spent the past few months bonding behind the scenes before making their first debut in the rainforest canopy inside of their Natural Encounters Building last week. According to the Animal Diversity Web, the pygmy marmosets are the smallest extant monkeys, measuring about five inches in length and weighing 4.3 pounds on average.