Question

Cursorial and running feet is found in:
(A)Crows
(B)Sparrows
(C)Emu
(D)Pheasants

Answer 1

Hint: The organism which is adapted specifically to run is called a cursorial organism. The organism which has the ability to run fast is called cursorial. Cursorial adaptations are identified by morphological characteristics (loss of lateral digits), physiological characteristics, maximum speed.

Complete answer:
1.In the terrestrial vertebrates, the adaptations for cursorial locomotion is – increased stride length, decrease distal limb weight, reduction or loss of digits etc. the cursorial animals have increased elastic storage in their epaxial muscles.
2.Several species of birds are also cursorial such as ostrich, emu, greater rhea. Several rodents are also cursorial.
3.Emus are flightless birds with long necks and legs. Emus can travel great distances. Emus have vestigial wings. They flap their wings while running to stabilize themselves when moving fast.
4.Emus have adapted to cursorial adaptation. Their feet have only three toes and a reduced number of bones and foot muscles. They can run at 48 km/hr due to their highly specialized pelvic limb musculature.
5.Emus are powerful and large birds. Their legs are strongest and powerful enough to tear down metal fencing.

Hence the correct answer is option(C)

Note: Emus have three toes on each foot which is an adaptation for running. It is also seen in other birds such as bustards and quails. Emu is the second tallest bird in the world. Its legs are devoid of feathers. The eyes of emu are protected by nictitating membranes.