The African wild dog is one of the
most endangered canids in the world, with only about 3000 to 4000
left in the wild. As with all endangered species, we may wonder
how its populations declined and what can we do to stop further
loss. I hope this article will shed some light on this very complex
species and its problems.
Physical Characteristics:
African wild dogs have a striking patchwork coat of black, tan,
brown, gray, and white. They almost always have white tail tips
and some form of black "mask" on their faces, which is
framed by their large, rounded ears. Their long-legs and light,
waspish bodies make them well-suited for traveling long distances
and chasing prey. They range from 30-44 inches (76-112 cm) in height
and from 37-79 lbs. (17-36 kg) in weight. Observers sometimes mistake
wild dogs for hyenas due to their broad heads and short, powerful
muzzles.
Social Characteristics:
Wild dogs live in packs composed of related males and one to several
related females. Years ago packs contained as many as 40 or 50 members;
today, packs have only about 20 members at most and average 6 to
8. Unlike many species, females 18 months of age and older leave
their packs in hopes of finding a mate in another pack. This migration
helps maintain genetic diversity. Only one pair of dogs in a pack,
the alpha pair, breeds.
Because wild dog litters are usually
very large (up to 16 pups), feeding and raising them becomes a group
effort for all adult and older juvenile dogs. Until pups can hunt
with the group, pack members on the hunt will bring back portions
of each day's kills for the lactating mother and other wild dogs
that have stayed behind to guard the den or baby-sit with the mother.
The easiest way for wild dogs to carry large amounts of food over
great distances is in their stomachs; thus, they regurgitate the
food for pups and non-hunting pack members upon their return. The
pack has numerous greeting ceremonies and hunting "pep"
rallies and all members of the pack enjoy playing with the pups.
Imagine an extended family of aunts and uncles all participating
in child rearing duties and you will have an idea of life in a wild
dog pack.
One of the most unusual sights in
a wild dog pack is the lack of aggression at a kill. Virtually
no fighting occurs; it is almost a contest to see who can be the
most submissive. Unlike wolves and lions, wild dogs allow the aged,
young, and sick equal access to a kill. If the healthy adults have
not satisfied their hunger with that kill, they simply hunt again.
What Wild Dogs Eat and How they
Hunt:
African wild dogs usually eat small impala (Aepyceros melampus)
and gazelle (Subfamily: Antilopini), though they also hunt reebuck
(Redunca arundinum), kudu (Tragelaphus strepsiceros), wildebeest
(Connochaetes taurinus, and even zebra (Equus burchelli). The pack
hunts as group, chasing down the target and changing leaders as
each becomes tired. In many instances one dog will grab the nose
of the animal while others attack the soft underbelly, usually killing
the prey fairly swiftly. Because wild dogs are smaller hunters,
they must eat their kill quickly since lions and large hyena packs
often chase them from the kill. They den only once a year, usually
during the rainy season when game is plentiful. Otherwise, they
constantly move about, with home ranges ranging from 180 to 540
square miles (500-1500 sq. km)! If prey abounds and local lion populations
are low, home ranges may fall on the smaller end of this scale.
In areas with higher wild dog population densities, home ranges
may overlap. Movements of this truly nomadic species makes accurate
counting very difficult.
Where They Were and Where Are They
Now:
Populations of wild dogs once lived in all of southern and western
Africa below the Sahara desert, but now viable populations (more
than 50 dogs) exist in only 8 African countries: Botswana, Zambia,
Tanzania, South Africa, Zimbabwe, Senegal, Namibia, and possibly
Kenya. Although people have spotted wild dogs in other countries,
their numbers are too small to become anything more than a passing
statistic; many countries have had only one or two packs in the
last decade. In many of the countries listed above, national parks
are taking an active role in protecting wild dogs, although this
can be a monumental task given the large home ranges these animals
need.
Why They Are Endangered and What
Can Be Done:
As much as I would like to attribute the decline of African wild
dogs to some environmental extreme, I must blame human actions,
direct and indirect, for their low numbers. In the 1920s when big-game
hunting was becoming more popular in Africa, hunters considered
wild dogs a threat to game species and exterminated them on sight.
They were seen as a wanton killer with none of the "noble"
traits of the big cats. In later years and in present day, agriculture
and livestock grazing have taken over much of the savannah that
used to be home to native grazers. To keep wild dogs from hunting
their livestock, farmers have set out poisoned baits (and still
do in some areas).
Wild dogs have never been a real threat
to domestic livestock, preferring native prey and areas unpopulated
by humans. Other domestic animals introduced a whole host of foreign
diseases like rabies, distemper, parvovirus, and anthrax, all of
which have taken a heavy toll on the already beleaguered wild dogs.
Due to frequent contact among pack members for play and greeting,
rabies or distemper can kill a whole pack within days. Unfortunately,
wild dogs do not respond to current canine vaccines; however, programs
have begun that promote vaccination of domestic animals near national
parks (especially now that lions, too, have become threatened by
distemper).
Education has lifted public awareness
and has dispelled myths about wild dogs and the way they
live and feed. Everywhere that wild dogs have been studied, populations
have remained stable and in some instances are growing. Zoos have
started adding them to their collections to help maintain genetic
diversity if they should become totally lost in the wild. All these
programs require money and Africa is a poor continent. Their resources
are stretched to the maximum. Money is needed for education, scientific
studies, and for protecting land in large enough tracts so that
a true diversity of life can live there without having to go out
of protected areas. One of the most immediate things you can do
is to donate much-needed dollars to one of the many groups that
are working to rescue endangered species and prevent the decline
of others. Although this piece has focused on wild dogs, it could
be about any one of the species threatened by our collective lack
of understanding or concern. One by one, species large and small,
homely or handsome, are becoming only spectacles at a zoo or glossy
pictures of what once was.