Eastern Gorillas don’t have a large amount
of interactions with other creatures which is odd considering that
they live in the forest which is a heavily diverse area. The main
reason gorillas don’t have many interactions with other organisms is
because they very much keep to themselves. If a bird flies by they
might look up or roar if it surprises them, if a reptile wanders
around it’ll look at it but that’s about it, if another mammal is
around it will make eye contact or maybe just look then look away.
The only non-primate organism that gets any attention is the insects
and that is because the gorillas are eating them. There have been
some cases of leopards predating young gorillas but, it is highly
uncommon. Gorillas largely keep to themselves but, when it comes to
other primates especially other gorillas it’s a whole different
story.
Eastern Gorillas are highly social and
travel in groups called troops that are led by a dominant silverback
male. These troops consist of a dominant silverback, a few females,
and some young males who are usually offspring. Eastern Lowland and
Mountain Gorilla troop sizes average around 9-10 gorillas. These
troops travel together and are led, protected, and directed y the
dominant silverback. Sometimes there will be troops led by multiple
males but that is highly uncommon since the males are very
protective of those around them. These groups are nonterritorial and
the silverback will always defend his troop over his territory. The
relationships among females are relatively weak since their main
objective is to find other males to mate with.
In Eastern Lowland Gorillas the male leaves
the natal group when mature and attracts females to him and when a
dominant silverback dies the troop will search for a new leader as
they often don’t have any mature males in their group. Mountain
Gorillas have a similar social structure to that of the Eastern
lowland Gorilla in the way that the females leave the group and find
males and some males become solitary and attract females when
they’re mature, they do almost everything else differently. The
majority of male Mountain Gorillas stay within their group and are
either allowed to mate with females or await their turn to take over
when the silverback dies. If there is only one silverback in the
group the females disperse and find new males when he dies. This
often leads to infanticide in order to keep the young from being
predated by leopards. In some unstable groups the young will be
killed by the new dominant silverback as a reproduction strategy.
When the female dies in a group the male will take care of them and
do all the things the female would including allowing them to sleep
in their nest.
Eastern Gorillas communicate in a variety of
ways whether it is through physical movement or actual vocal sounds.
Their communication is very similar to that of humans in terms of
facial expressions. While they don’t have a distinct language there
are certain things that are standard such as certain grunts or
movement used for mating that are covered in the reproduction
section of this webpage. There can be whimpers and whines during
infancy and copulation, a deep purr during a period of relaxation,
loud grunts and barks when signifying the whereabouts of others or
giving directions, and loud whoops with chest beating when signaling
danger or trying to scare away creatures. Eastern Gorillas are very
peaceful and gentle but can become hostile quickly if given the
wrong signal such as direct eye contact which is seen as a direct
threat and a a sign of aggression.
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