In ten go by , rumors swirled around the forests of Africa that verbalise of a foreign chimpanzee - Gorilla gorilla hybrid , get it on as koolakamba . They ’ve been the subject of a small handful of study since the 19th century , but hard cogent evidence – or even stout grounds – of their being has carry on to parry scientists .

One of the more recent mentions of koolakamba ( aka kooloo - kamba ) can be find in a1984 paperby biologist Brian T Shea in which he delineate the “ recollective history of controversial debate ” that ’s surrounded the universe of the purported loan-blend species .

The study explains that the first written description of koolakamba came from Gallic - American explorer Paul Du Chaillu during his venture across equatorial Africa in the 1850s .

A female mountain gorilla with a baby (left) and a female chimp with a baby (right).

Spot the difference: a female mountain gorilla with a baby (left) and a female chimp with a baby (right).Image credit: GUDKOV ANDREY/Shutterstock.com and Patrick Rolands/Shutterstock.com

In Du Chaillu ’s 1890 business relationship of the expedition , he write : “ We had scarce acquire decipherable of the bashikouays [ ants ] when my ears were saluted by the singular rallying cry of the ape I was after . ' Koola - kooloo , koola - kooloo , ' it said several time . Gambe and I raised our eye , and saw , high up up in a treebranch , a great ape . We both fired at once , and the next minute the inadequate brute fall with a lowering clangor to the ground . I rushed up , anxious to see if , indeed , I had a fresh animal . I watch in a minute that it was neither a nshiego - mbouvé [ another of Du Chaillu ’s imitator calssificaitons ] , nor a chimpanzee , nor a Gorilla gorilla . ”

Du Chaillu tell the bombastic creature had a round head and black face with eminent cheekbones and a fine jaw that was importantly less spectacular than the other ape he had arrive across . He also address to locals who articulate they call off the animal " koolakamba " , most in all likelihood reference its strange outspoken watchword .

Du Chaillu never explicitly claim the individual was the product of chimpanzee - gorillahybridization , but speculation mounted in the years ahead .

The rumors win traction in the previous 1800s and other 1900s when more European coloniser started to describe the riches of primates that dwell Africa ’s jungle . From the get - go , there was disagreement and mental confusion surrounding the turn of species and sub - metal money to distinguish both Pan troglodytes and Gorilla gorilla . Amid the messy debate , some speculated that some of the species they were coming across were , in fact , half - chimp and half - gorilla .

European scientist even started to question whether some of the great apes that had been taken from Africa and position in zoological garden were chimpanzee - gorilla hybrids . One corking emulator prognosticate " Mafuca " was bring from the Loango seacoast of Africa to Germany ’s Dresden Zoological Garden in 1874 . An especially with child and “ uncontrollable ” brute , numerous scientists were unable to concord whether she was a chimp or a gorilla , while some concluded she was an example of a koolakamba .

Such a hybrid could be potential , at least hypothetically . The natural chain of chimps and Gorilla gorilla have some overlap , most notably in equatorial African area like Gabon , the Republic of Congo , and the Democratic Republic of Congo . In exceptionally rarified cases , scientistshave even documentedlethal attacks by chimpanzees against Gorilla gorilla , show these animate being have a clear cross - over .

Furthermore , forward-looking desoxyribonucleic acid testing has shown gorillas and chimp ( not to forgetbonobos ) are exceedingly closely related , genetically speak , signify that hybridization is n’t out of the realm of possibility .

However , few primatologists today wouldeven flirt with the ideathat a viable universe of chimp - Gorilla gorilla hybrids is secretly subsist in the natural state .

In his 1984 composition , Shea explain that the fable of koolakamba ultimately stems from confusion . other endeavor to categorize the different coinage of Gorilla gorilla and chimp were haphazard , plus they did n’t yet have the shore leave of transmissible analytic thinking to validate their findings . The categorizations were also infused with the “ autochthonic labels and kinsfolk taxonomies ” of local citizenry , which were frequently misunderstood and mistranslated .

Nevertheless , Shea argue that the recurring theory of the koolakamba does foreground some biological truths :

“ Purported kooloo - kambas and other individuals claimed to be medium between chimpanzee and gorillas have loosely turn out to be either with child male Pan troglodytes or belittled distaff gorillas , and this fact lead us to what I view the most important implication of this debate . The disagreement , confusion , variation , and use of average or hybrid categories in both westerly and autochthonic classifications reflects an authoritative biologic reality , ” he spell .

“ Recent genetic investigations in the great apes have demonstrated this similarity . This congruence is so dandy that the product of viable hybrid remains a material possibleness , although I stress that this has never been attempted in captivity nor demonstrated in the natural state , ” he impart .