how is it related to human burial grounds?
They feed on human corpses.
Spotted hyena
Although attacks against living humans are rare, the spotted hyena readily feeds on human corpses
what is quagga? A subspecies of the plains zebra. where is it found? In South Africa. is it a surviving or extinct animal? It is now extinct. is any effort taken to bring it back by any chance? Yes, the Quagga Project. when was it started? In 1987. whose initiative was it? Reinhold Rau. who is this person? UNANSWERABLE which milestone did the project achieve? The Project's first foal was born on 9 December 1988. On 20 January 2005, Henry (a foal considered to be the first quagga-like individual because of a visible reduced striping) was born. The first 5th generation foal was born in December 2013. the kind of zebra that you mentioned in your answer, how does it look? The species is intermediate in size between the larger Grévy's zebra and the smaller mountain zebra. It is dumpy bodied with relatively short legs and a skull with a convex forehead and a somewhat concave nose profile. and how does it communicate? Through six different calls. who are its predators? Lions and spotted hyenas. what other names does this latter one have? Laughing hyena. does it have any competitor? Crocodiles and African rock pythons.
wiki:4961037
Spotted hyena [SEP] Attacks on humans and grave desecration
Although attacks against living humans are rare, the spotted hyena readily feeds on human corpses. In the tradition of the Maasai and the Hadza, corpses are left in the open for spotted hyenas to eat. A corpse rejected by hyenas is seen as having something wrong with it, and liable to cause social disgrace, therefore it is not uncommon for bodies to be covered in fat and blood from a slaughtered ox. In Ethiopia, hyenas were reported to feed extensively on the corpses of victims of the 1960 attempted coup and the Red Terror. Hyenas habituated to scavenging on human corpses may develop bold behaviours towards living people; hyena attacks on people in southern Sudan increased during the Second Sudanese Civil War, when human corpses were readily available to them.