Tuk, a 16 year old pileated gibbon, has given birth at the Gibbon Conservation Center in Saugus. They can't yet tell the new arrival's sex — it's clinging tightly to mom's belly — but it's nursing and both apes are thought to be doing fine. This photo is from my visit to the center last year. On Saturday, the gates will be open for visitors at the annual Breakfast with the Gibbons fundraiser. You might hear the primates belt out their territorial songs or catch some aerial acrobatics to go with a vegan feast and kids' activities.