Keeper Heather Anderson cares for many rare species at the Bird House, including a pair of blue-billed curassows. Native to Colombia, these birds are considered critically endangered; scientists estimate only 300 to 800 individuals remain in their native habitat. Anderson reports that this pair has a strong bond, and keepers are hopeful they will produce a chick. Meantime, she is training them to voluntarily participate in their health care. When she enters the exhibit, she cues the curassows to “station” (stand still) on a stump. This allows her to examine the birds closely and look for any signs that they may need medical attention. Once a month, she places a scale on the stump so that when they “step up” she can monitor their weights. The male currently weighs 8 pounds, and the female weighs 6 pounds.