#4 Judging by the description, all seagulls are not alike, but the same features are still present.
Aerodynamic body. Each species of gull has a long and streamlined shape. All gulls have wide wings and a square tail. There is no need to look for gender differences in birds, they are not.
#5 Seagulls are birds of prey.
Therefore, the color matches. The middle paws are usually reddish or black and have membranes.