Southern Ground Hornbills (Bucorvus leadbeateri) in Kruger National Park. Ground Hornbills are the largest Hornbills (a meter tall) and primarily ground-dwelling (unlike other Hornbills). In South Africa there has been a large decline in their numbers and they now occur only in reserves. They are popular to use in tribal medicine among some of the indigenous people. The brain of a Ground Hornbill, if kept in a village, is reputed to bring the village luck. Irate homeowners kill them because they will attack windows, breaking them, if they encounter their reflections. They are also vulnerable to picking up poison baits that are set out for predators.