 The New Guinea crocodile grows to a length of up to 3 @.@ 5 m ( 11 ft ) for males and 2 @.@ 7 m ( 8 @.@ 9 ft ) for females , although most specimens are smaller . The body ranges from grey to brown in colour , with darker <unk> on the tail and body which become less noticeable as the animal grows . Longitudinal ridges in front of the eyes and some granular scales on the back of the neck between four large scales are distinctive features of this species . There are some differences between the northerly and southerly populations in the morphology of the skull and the arrangement of the scales . The snout is pointed and relatively narrow during juvenile stages and becomes wider as the animal matures . The New Guinea crocodile bears a physical similarity to the nearby Philippine crocodile ( C. mindorensis ) and Siamese crocodile ( C. siamensis ) . The colouring is similar to that of the freshwater crocodile ( Crocodylus johnsoni ) of northern Australia , but the snout is somewhat shorter and broader . 
