A tiny bird weighing only 71 grams dares to peck at a hawk's head, but the notorious predator doesn't dare to fight back.

Surprisingly, the hawk, although much larger, did not dare to respond to this small bird.

Hawks, also known as falcons , belong to the subfamily Accipitrinae and are mostly in the genus Accipiter. Hawks are carnivorous birds known as the most intelligent birds among birds according to research by Dr. Louis Lefebvre. In Vietnam, hawks are often distributed in the Central and Southern regions.

Hawks are notorious birds of prey, so they have a sharp hooked beak, quite long, wide wings and a pair of extremely strong legs. Adults have a body length of 0.7m - 1m with light brown plumage, wide wings and a curved tail.

The hawk is a fast-flying bird, capable of swooping at speeds of up to 320km/h. In the world of birds, few species can match the hawk in terms of agility and cunning.

Hawks are also said to have very good eyesight, reaching 20/2, which is about 8 times better than people with good eyesight.

Although hawks are "hunters" that many animals fear, in reality they are also attacked by a very small bird.

A Great Kiskadee repeatedly jumps on the back and tries to peck at the head of a hawk on the outskirts of San Salvador. (Photo: Dailymail)

Gerardo Grassl, a photographer, captured the moment a Great Kiskadee repeatedly jumped on the back and tried to peck at the head of a hawk in the suburbs of San Salvador, the capital of El Salvador. Although the hawk tried to fight back, the Great Kiskadee refused to stop, despite the possibility of being killed at any time.

The photographer speculated that the little bird was trying to protect its chicks. In the end, the Great Kiskadee escaped unharmed.

The Great Kiskadee (Pitangus sulphuratus) is a bird in the family Tyrannidae. It is the only member of the genus Pitangus. It is found in many parts of the world, from Brazil, Paraguay, to Argentina. The Great Kiskadee is 25 to 28 cm long and weighs 53 to 71.5 g. Its distinguishing features are its black head with a strong white band and a hidden yellow band.

The Great Kiskadee is a highly alert bird, and will often attack aggressively when it feels uncomfortable with its enemies. (Photo: Dailymail).

The Great Kiskadee is usually found in open forests with some tall trees, including crops, and around human habitation. This bird is highly alert, and will often attack aggressively when it feels uncomfortable with its enemies. Its fighting style is usually to fly high and then swoop down to strike the opponent's back or head. Many birds such as hawks, falcons, and eagles have been defeated by the Great Kiskadee because of its unpredictable actions.