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BLACK-BACKED JACKAL Communication

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BLACK-BACKED JACKAL Communication Series: 1-001/1 conspicuous objects such as grass tufts or rocks. Calling is also used as a means of BLACK-BACKED JACKAL communication. Hunter and scavenger • The main predator of the black-backed jackal in some areas is the leopard. Scientific name: Canis mesomelas Track/spoor • Dog-like tracks that show claw marks. • 5 toes on front feet, but first toe is set back and does not mark the spoor. 4 toes on hind feet. • Profile: oval - longer than wide. Photograph taken by BB Janecke Role in landscape Black-backed jackals are highly adaptable. Description They are generalist predators, which means that • Black-backed jackals have a reddish-brown to they are opportunistic feeders, eating whatever is tan coat, and a distinctive grey-silver to black most abundant and easily obtained. saddle with white flecks on their back. The tail They are very effective hunters. Where top has a black tip. The ears are fairly large, predators are absent, black-baked jackals have triangular, and reddish at the back. taken over this role. Males are larger and heavier than females. They keep the veld clean by scavenging. By being around a carcass, they may indicate to Size of adult Male Female vultures that it is safe to eat. Total length 83-130 cm 77-120 cm Jackals are part of an intricate network. Tail length 31-40 cm 23-37 cm Unselectively removing jackals can lead to an Body mass 6.-12.5 kg 4.8-11.5 kg increase in small and medium-sized predator numbers, creating new problems. • They reach the age of 6-8 years in the wild. • Males and females will mark their territory Reproduction depending on food and competition. • Black-backed jackals breed only once a year • They usually live in breeding pairs; the pair- (monoestrus), and mainly use underground bond between a male and his female is very dens for whelping. strong. • Litters are usually born in August, but this may • They are active mainly at night (occasionally vary between regions, depending on habitat appear during daytime). During the day they and food. Litter size may vary from 1 to 9, but usually rest in shady high-laying areas. there are usually 4 to 6 pups in a litter. • Where water is available, they will drink • Both the male and the female (and regularly. occasionally a helper - an offspring from the • They have a very strong sense of smell and previous year’s litter) will care for the pups. hearing; their most important means of communication are based on these senses. Adults scent-mark with urine and faeces on Feeding behaviour but will usually not remove the carcass from Diet the killing site. Black-backed jackals are omnivorous, and their Management methods diet is determined by the habitat that they live in. Black-backed jackals are adaptable, with a high The diet includes: reproductive capacity. • Insects and other invertebrates On livestock farms, they become a problem • Rodents particularly during lambing and calving seasons. • Reptiles It was estimated that black-backed jackals have • Carrion (the remains of dead animals) killed a total of 113 624 head of small livestock • Frogs over a 2 year period in the five major small • Birds livestock producing provinces of South Africa. It • Smaller antelope species such as steenbok is not advisable to attempt to eradicate them and springbok from an area. Thus, management should be practised and aimed (as far as possible) at the • Plant material (berries, seeds and fruits) • individuals that are causing damage. Domesticated sheep, goats and cattle Non-lethal Hunting technique/feeding signs • Black-backed jackals opportunistically hunt in Predator-proof fencing groups when suitable prey is available. They may • Electric fencing (especially around lambing also congregate at the site of a carcass but will camps) return to their own territories. • Kraaling They chase prey, biting as the prey runs. Prey’s • Deterrents - noise, light and scent ears are often torn in the process. • Shepherd Larger prey is killed with a throat bite that • Collars suffocates the animal, or by tearing open the • Guard animals abdomen. Clear bite-marks are usually visible between the Lethal ear and eye of the prey. Bite-marks can also • Foothold traps appear on the back legs and the udder. They • Call-and-shoot tend to take one animal per hunt. • Livestock Protection Collars (1080) Where larger predators dominate, a large part • Poison ejectors of the diet is made up of carrion scavenged from their kills. Where animals die of disease, drought Other management methods that can be used, or other environmental factors, scavenging will include: also be the main feeding behaviour of the black- • Multispecies grazing (for example, cattle and backed jackal. sheep grazing together) • Changing livestock breeding (adapting the time • Black-backed jackals usually start feeding in of lambing and calving seasons so that they do the groin or thigh area (leaving a flap of skin, not coincide with periods when black-backed hollowed out underneath). They also hollow out jackals have higher energy requirements) the chest cavity, eating all the organs. • Selective grazing (avoiding certain areas The meat around the shoulder of larger prey is during periods of higher predation risk) eaten, and they may remove the front legs of smaller prey. When used in combination, some of these Intestines are often eaten and scattered methods can be very effective. It is important to around. keep in mind that situations on farms differ and • Rib ends are often chewed. The nose and ears management methods that are effective on one of prey is also eaten in some cases. farm may not be as effective on another farm. • As with other canine species, some black- backed jakcals may bury what they cannot eat .
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