Riddles for Krithi's favorite topic (birds)

I can fly,

In the process of migration

High in the sky,

I am in a V- formation

Who am I?  (Goose)

My head is white,

Though people call me bald,

I have incredible eyesight,

What am I called? (Eagle)

I am incredibly tiny,

I think flowers are yum,

When I beat my wings,

All you hear is a hum

What am I? (Hummingbird)

When I circle above,

You know something is dead,

People think I look gross,

Cause there’s nothing on my head,                

Who am I? (Vulture)