Answer:
My first is in fish but no in snail. My second is in rabbit but no in tail. My third is in up but not in down. My fourth is in tiara but not in crown. My fifth is in tree you plainly see. My whole a food for you and me.
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own.
Voiceless it cries,Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters.
There are millions of me. I am very small but when moving fast I am deadly.
I have four wings but cannot fly. I never laugh and never cry. On the same spot always found, toiling away with little sound.
People take me on walks and I run and have fun. What am I?