It is generally accepted that there are 16 different species of penguin. However, the figure has always been and still is very controversial. As a safe measure, most literature lists it as varying between 16 and 19 species.
The debate surrounds three penguins. The first is The White-Flipped Penguin is sometimes thought to be a subspecies of the Penguin; the second is the Royal Penguin is considered to be a color morph of the Macaroni penguin and the third is the Rock hopper penguins which could be a separate species.
Someone - or a lot of someones - agreeing with your interpretation doesn't make it correct. Poetry is art, not science. You'd be better off asking yourself how these lines make you feel. That's more important than what they mean or don't mean.
Poetry (and art and comedy) is like science in one way: in order for scientists to examine some living things, they often have to kill them first. You know, in order to slice it thin enough to fit under the microscope. Or the living things die very quickly as a result of their unfortunate interaction with the scientist. When academics deconstruct poetry or art they also kill it by imposing their rules and definitions onto it, and making you think about their analysis rather than having an emotional reaction to the work.