Keepers at Jacksonville Zoo recently discovered the egg their Wattled Cranes were sitting on was not fertilized. They contacted their friends at White Oak Conservation for assistance. White Oak happened to have a pair of Wattled Cranes who laid an extra egg.
The average clutch size of the Wattled Crane is thought to be the smallest of any of the world's cranes. Generally, in a nest of two or more eggs, only one chick will survive to hatch or fledge. Therefore, removing the extra egg was a possible ‘saving grace’ for the chick inside.
As a first step, keepers at Jacksonville Zoo decided to swap out the non-viable egg from their nest to a dummy egg, until they knew White Oak’s extra egg was close to hatching. When that time came, keepers at Jacksonville placed the egg in their birds’ nest. The egg hatched on March 5th, and they now have a healthy male chick!
The cranes are raising the ‘adopted’ chick as their own, and visitors to Jacksonville Zoo can see the new family at the African Boardwalk exhibit!
The Wattled Crane (Grus carunculata) is a large bird found in Africa, south of the Sahara Desert.
It is the largest crane in Africa, at a height of up to 175 cm (5.74 ft) and is the second tallest species of crane, after the Sarus Crane. The wingspan is 230–260 cm (7.5–8.5 ft), the length is typically 120 cm (3.9 ft) and weight is 6.4–7.9 kg (14–17 lb) in females, 7.5–9 kg (17–20 lb) in males.
The Wattled Crane is native to eleven sub-Saharan countries in Africa, including an isolated population in the highlands of Ethiopia. More than half of the world’s Wattled Cranes occur in Zambia, but the single largest concentration occurs in the Okavango Delta of Botswana.