Maybe the ones in Prague just didn't happen to do it when you were there? The Shoebill in this video (Sushi) is used to meeting tourists on practically a daily basis. They range in size from the small hammerkop, at about 2 feet tall (56 centimeters), to the looming marabou stork at nearly 5 feet in height (1.5 meters). Named after their prominent shoe-shaped bills, shoebills are a vulnerable bird species whose feathers turn completely gray as they mature. They might not do it with everyone though. Only a few zoos in the world have shoebills, so the Houston Zoos addition of this young pair of big African birds is a significant achievement for our bird department. Shoebills, on the other hand, don’t fly very far or very often. Can A Shoebill Stork Fly They may be large, yet they have the ability to fly if they so desire. The shoebill storks have a height range of about 110cm-140cm while standing tall on its legs and a long foot that goes up to 18cm which enables them to stand on. The Shoebill stork, Balaeniceps rex, also known as Whalehead or Shoe-billed Stork, is a very large Stork-like bird. Males are slightly larger in terms of body and bill size. Where does Shoebill Stork live They live in the swamps of eastern tropical Africa. Standing between 4.5 and 5.5 feet in height (and with a weight of 12 pounds), the shoebill stork is among the largest birds in the world. They believe the humans are their fellow shoebill and will bow to them as they would each other in the wild. How tall is a Shoebill Stork It can grow up to five feet tall with an eight-foot wingspan. Size: The Shoebill stork stands 3.5 5 feet (1.07 1.5 m) tall weigh an average of 12.3 pounds (5.6 kg) have an average wingspan of 7.7 feet (2.33 m). When Shoebills are raised in captivity they imprint on the humans, especially the zookeepers who are feeding and interacting with them on a daily basis. You can see the bow in the beginning and also hear the bill clattering which is a form of communication between the shoebills. The average shoebill stork can eat up to two kilograms of food per day. This weight can be attributed to the amount of food they eat. Shoebill storks can weigh up to 40 pounds (18 kg). The average height of a shoebill stork is about 11 feet (3 m). Here's a video of a Shoebill greeting it's mate at their nest in Zambia: The tallest record-holding shooebill stork was 16.5 feet tall (5 m) and lived in Central Africa. I'll copy my comment from another thread:

Shoebill stork height