For several reasons, but a key one would be that a diet of insects require sharp, strong teeth for crunching exoskeletons, while nectar wouldn't really require any teeth. The needs of the creatures would be different -nectar would require a mouth suited for suction, while insects would need teeth to macerate the food.
Beaks of all birds are used as tools to eat, build, and preen feathers. Beaks are made of keratin; as are their feathers and toenails.
The rostrum is the snout of the whale.
The rostrum is the front mouth part and inside the rostrum are the Orca’s teeth.
A rostrum is a place to make a speech.
A rostrum is a place to make a speech.
The rostrum is the part of the crayfish that is located between the eyes and the antenna. Rostrum is Latin for "beak" so the rostrum on the crayfish is considered its beak.
Rostrum Records was created in 2003.
the rostrum is the snout of a fetal pig
I looked in the shop to find a rostrum sitting in the window.
A rostrum is a raised or elevated platform or pulpit usually for addressing an audiance As related to biology is a beaklike process or extension of some part. For example, the great white shark, it is pointed above the nose, that is the rostrum.
A rostrum on a crayfish is an extension of its shell. This part is used for extra protection.
The president stood on the specially prepared rostrum and announced Peace .Hope It Helps ;)