1. Which animals came to a giraffe carcass in Kruger National Park, and in what order?
An American observer wrote about a giraffe carcass in Kruger National Park, South Africa, in 1995 [1]. Lions likely caught the giraffe during the night. Hyenas and jackals gathered later, drawn by the noise. After the lions left, vultures stripped most of the meat over the next day. Finally, flies, maggots, and beetles cleaned up the bones, skin, and hair.
The flow was: large carnivores, then hyenas and jackals, then vultures, then insects. This is one example seen by one person, with some guesswork included. It is too early to treat this order as a rule for every carcass. So, what do studies from other places show about the arrival order?
2. Why the order of scavengers changes with prey size, location, and how the carcass was found
A study in Tanzania’s Serengeti examined 639 cases of prey caught by cheetahs [2]. Larger prey tended to attract small, medium, and large vultures, jackals, hyenas, and lions. Among vultures, medium-sized species often arrived before larger or smaller species.
You often hear that "hyenas find carcasses by watching where vultures land." However, this study found no evidence for that. Hyenas and vultures are often at the same place, but not necessarily because one is signaling the other. Whether hyenas or vultures arrive first varies by study.
Hyenas are not strictly "scavenging specialists." In the Serengeti, spotted hyenas get about 33% of their food from carrion [3]. In another group in Kenya’s Maasai Mara, they got about 95% of their meat from their own hunts.
Vulture movements have also been studied. A tracking study with GPS tags on 39 vultures in the Maasai Mara showed they moved to places where animals die, not just where herds are [4]. They mainly gather for the wildebeest migration during the dry season (July–October), when many wildebeest die. They follow "where death happens," not just "the herd."
So, do vultures fight over one carcass? Let’s look at how they share.
3. When and where different vultures arrive and feed on a carcass
An experiment in the Maasai Mara placed a goat carcass to observe vulture arrivals [5]. In dry season mornings, white-backed vultures and Rüppell’s vultures were common. Lappet-faced vultures arrived more in the afternoon.
By afternoon, the morning species were full and leaving. Lappet-faced vultures approached one by one during this changeover. However, the amount they ate (measured by crop fullness) was lower than the morning species. It is not simply that "strong birds eat first."
The body parts eaten also differ. A summary of an Oxford University thesis from the early 1970s says there are seven vulture species in the Serengeti, each with different habits [6]. Two species tend to take soft parts of the carcass.
Lappet-faced vultures are said to be strong and aggressive among African vultures. They have beaks that can tear thick skin and sinew [7]. They often wait at the edge of a flock and eat hard parts, like skin and sinew, after other birds have eaten.
They share one carcass by shifting time and location slightly. What happens to the bones left behind?
4. How hyenas and bone-eating birds break down bones
Spotted hyenas are known for having extremely strong jaws that crush bones. In the wild, they have been observed breaking thick giraffe bones [8]. Their premolars are cone-shaped. The teeth used for cutting meat (carnassials) are in a position less likely to be damaged when crushing bone.
Birds also specialize in bones. Bearded vultures eat mostly bones [9]. They have many acid-producing cells in their stomachs. It is thought they dissolve calcium from bones using acid. In an experiment with two captive birds given sheep ribs, most of the food was digested within 24 hours. This does not mean "bones melt in a few hours." Bone marrow is high in fat and can be an energy source similar to muscle.
Bones too large to swallow are dropped onto rocks from heights to break them [10]. However, bearded vultures live mainly in mountainous areas, so they do not always come to savanna carcasses.
Animals crush bones; birds dissolve them. What happens next? Where do the crushed bones go?
5. How crushed bones return calcium and phosphorus to the soil through hyena droppings
A study in South Africa found that hyena droppings contained 1,000 to 20,000 times more calcium and phosphorus than the surrounding soil [11]. They are white, so they can be identified. Small bone fragments in the droppings are also used by birds.
Calcium and phosphorus from bones pass through hyenas’ bodies into droppings, returning to the soil and organisms that use it. Hyenas are thought to play a role in returning bones as nutrients to the soil and ecosystem.
These numbers compare droppings and soil in specific places. The study looked at brown hyenas in the Kalahari and spotted hyenas near Kruger. It is not the total nutrient amount of the whole savanna. Thus, the body of a fallen animal is passed from carnivores, hyenas and jackals, vultures, and insects, ending as nutrients in the soil.
6. How to compare the beaks and teeth of vultures and hyenas at zoos or parks
If you see vultures or hyenas at a zoo, look at the shape of their beaks and teeth. Imagine if they are shaped for tearing meat or crushing bones. This helps you understand "who eats what part."
You can observe in nearby places too. Watch birds coming to the same spot from a distance in parks or on balconies. Do not place food or feed them. Are there differences in bird species, arrival times, and eating spots for things already on the ground? The rules of the savanna may not apply here, but looking at "how they share" rather than just "the order" gives you a hint.
To learn more, look up Kendall et al.’s study on vulture timing (The Auk, 2014) or the study on hyena droppings (African Journal of Ecology). Are lappet-faced vultures only afternoon birds? When do hyenas reach a carcass? There is still room to investigate what this article could not fully explain.