If the sky is the ocean then what is a bird?
In that analogy a bird would be a fish.  There are a lot of similarities between birds and fish.  They both have vertebrates and are part of the animal kingdom and belong to the phylum Chordata.  They both consume nutrients to survive.
<START_INST>If the sky is the ocean then what is a bird?<END_INST><START_CTX><END_CTX><START_A>In that analogy a bird would be a fish.  There are a lot of similarities between birds and fish.  They both have vertebrates and are part of the animal kingdom and belong to the phylum Chordata.  They both consume nutrients to survive.<END_A>