It ’ s one of the most famous scenes from any movie , let alone Jurassic Park : Two raptors enter the kitchen , stalking two children - their human prey . But as the raptors make their screeches and calls , you might be surprised to know these sounds actually come from tortoises having sex . It turns out that many of the dinosaur sounds in the hit 1993 film were made by recording modern animals - including , bizarrely , tortoises mating . Scroll down for video . The sound designer for the 1993 firm has revealed some secrets of Jurassic Park - and it turns out the velociraptor 's 'barking ' noise ( kitchen scene shown ) was made by tortoises having sex . Other dinosaur sounds were 'voiced ' by a variety of animals . These include horses , donkeys , cattle and a dog for the T-Rex . In an interview for SF Gate , sound designer for the movie Gary Rydstrom confirmed the odd choice of sound effect . In August last year , researchers trained four red-footed tortoises to use a touchscreen in return for strawberries and other treats . The animals were able to identify between red triangles and blue dots on the display , and even learnt which side of the screen to press . The animals also were able to transfer this knowledge to a real-life , offline experiment . Professor Anna Wilkinson from the University of Lincoln led the study , alongside researchers from the University of Vienna . ‘ Yes , it ’ s a mating tortoise , ’ when asked about the sounds they make . Specifically , he says the ‘ bark ’ when one velociraptor first comes in the kitchen was created by recording a tortoise successfully mate with another at Marine World . ‘ It ’ s riding on the back of the female tortoise . So it ’ s climbing up her shell basically , and then it falls off . It ’ s a little sexual , ’ he said . This confirms what was reported by Vulture back in 2013 , that tortoise sounds were behind the noise of the raptors . But this wasn ’ t the only bizarre animal noise used in the movie ; it turns out horses , donkeys and even cattle were used for some of the other dinosaur calls . ‘ The brachiosaur ’ s singing is one of my favourite sounds in the movie because it ’ s beautiful , but like all good sound design it 's made from a non-beautiful source , which is donkeys , ’ Mr Rydstrom told Vulture . In an interview for SF Gate , sound designer for the movie Gary Rydstrom confirmed the odd choice of sound effect . ‘ Yes , it ’ s a mating tortoise , ’ when asked about the sounds they make . Shown is a stock image of Seychelles giant tortoises ( Dipsochelys hololissa ) mating . And even the T-Rex got the animal treatment , with Mr Rydstrom ’ s own pet Jack Russell terrier being used to voice the huge dinosaur . The fourth Jurrassic Park film - called Jurassic World and starring Chris Pratt - is scheduled to be released on 12 June 2015 . And a trailer confirmed velociraptors would be making a return in the film - but whether they will similarly be voiced by mating tortoises you ’ ll have to wait and see whether similar sound effects have been used . The 4th Jurrassic Park film - called Jurassic world and starring Chris Pratt - is scheduled to be released on 12 June 2015 . And a trailer confirmed that velociraptors ( shown ) would be making a return in the film - but you ’ ll have to wait and see whether similar sound effects have been used .
Sound designer in California has revealed some secrets of Jurrassic Park . One of the well-known scenes from the 1993 film is the kitchen scene . He said the velociraptor 's 'barking ' noise was made by tortoises having sex . Other dinosaur sounds were 'voiced ' by a variety of animals . These include horses , donkeys , cattle , and a dog for Tyrannosaurus Rex .