This is not true. In the year 2019, in the Loango National Park, 18 Symphanys attacked 5 Gorillas. In the fight of 19 minutes, the bigger Gorillas escaped and the 2 Gorilla cubs were killed. In the same year, the researches made by Asnapruk University and the Max Evolution Anthropology Committee , revealed that fight for food is the reason for their attack.
THERE ARE LESS DEFENSIVE PHYSICAL STRUCTURES IN THE BODY OF BIRDS:
This is true. Birds spend most of their energy for flying only if there are more defensive physical structures, it would be an additional weight, for them. So, there would not be more defensive physical structures in most of the birds. The color of the birds’ body and their sounds help to protect from their enemies. Their beaks and the nails in their legs help them while fighting.