Audio/visual unsynchronized: While swimming across a river, Tarzan gives off his full Tarzan yell while his head is completely submerged under water.
Revealing mistakes: In many scenes, you can see the trapeze bar Tarzan uses to swing through the jungle.
Continuity: When Harry sits down on the ground in front of Jane, there is a campfire on his left side. In subsequent shots, which show him from the front, the campfire disappears.
Continuity: When Jane falls in the precipice, she stays hanging in the rope, clearly in a free space. In following shots she appears with a boulder behind her.
Continuity: After the first Tarzan's yell, Harry has the gun on his right shoulder. Next shot he is holding the gun barrel with his left hand.
Continuity: After the safari people cross the river, the hippopotamuses follow them. Then Parker and Harry appear either with the guns lowered or with them pointed to the hippopotamuses.
Continuity: When the safari people stop to camp, Parker gives the orders to the carriers holding the gun about his waist, with the left hand. In the subsequent shot the gun is resting on the ground, with the barrel held by Parker's right hand.
Continuity: On the tree, Jane holds the Tarzan's right hand to help him to sit. The next shot shows him sat, with the right hand leaned on the tree.
Continuity: When Jane and Harry are saying good-bye, they are very close to each other, and she puts her right hand on his right hand. In the following shot they are a little way from each other and then he takes her hand and kisses it.
Revealing mistakes: Most of the shown elephants are obviously Indian elephants wearing artificial ears.
Miscellaneous: Tarzan is stalked by a lioness in the trees. Lions rarely climb trees except to escape heat and insects or poach a kill of another predator.
Continuity: During the river crossing with the hippopotamus attacks, Parker fires multiple shots from his two-barreled rifle without obvious reloading. Since his bandoleer does not change, he could not have reloaded it between cuts anyway (even if he had been physically been able too).
Revealing mistakes: In the scene near the end of the picture, when the elephants are tearing up the village of the little people, elephants are wounded: one is shown running off to the right, acutely favoring its front leg - a tether can be seen, between the leg and the neck of the animal, forcing it to run on only 3 legs.