Riddles

As promised, here are some riddles. I used the riddle template provided in my Survey of Children's Lit. textbook. Beware though, I'm not much of a riddle-writer. Remember, the template was made for children so these might be slightly juvenile. Oh well, it's all for fun anyway, right? Enjoy!

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Fuzzy and winged,
I come in several shapes and sizes,
But usually I'm always the same two colours.
I like to fly, work, and taste sweet flavours.
Who am I?

Cold and white,
I can be used for outdoor fun.
In a group with my peers we look all alike,
But examined alone I'm completely unique.
Who am I?

Silently swimming,
I can smell blood a 1/4 of a mile away.
People say I am a ferocious predator,
But I seldom attack humans on purpose.
Who am I?

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Now it's your turn. Post your answers in my comments. Good luck!