Which of the following is not a characteristic of ornithophilous flowers?
Large and bright coloured petals
Strong scent
Production of nectar
Producing large amounts of pollen
Ornithophilous flowers usually have large and bright coloured petals, strong scent, and produce nectar, but they do not produce large amounts of pollen as they are adapted to be pollinated by birds which do not require as much pollen as insects.
Option 4 is the correct answer.