Humans are animals, and this shows non-human animals can be queer too.
I don't think it shows anything more than that the animals in question engage in same-sex intercourse. Claiming anything more than that is, to me, arbitrary anthropomorphism. I am not prepared to accept that whales can be "queer" until whales start writing sociological papers for us to find out how they understand homosexuality in their system of norms and values.
The fact animals have some behavior shouldn’t, alone, be a justification to punish or encourage some behavior.
Maybe I'm jumping the gun here, but I've been in plenty of discussion already where animals engaging in same-sex intercourse was used as an argument to defend queer rights - e.g. my local queer association did hold such a panel discussion at the zoo last May.
To see this news article in /c/lgbtq_plus instead of /c/biology or /c/science does make me extrapolate that this is somehow understood as being relevant to human sexuality.
What is important, imho, is what I wrote in my top-level comment: I don't want to find myself in the same camp as other groups who make "nature" arguments (like "evolutionary psychologists"). If I accept their premise, I will have to accept their conclusions too -otherwise I'd have to be cherry-picking naturalist arguments only when they are politically expedient for me.
I believe that this argument is best countered by saying that "regardless of what you think is natural or not, a person has the right to do what they want to do so long as their actions do not violate the freedoms and integrity of others". That's a moral value you can reason yourself into and you can be consistent about.