It depends on the species and how important they are to human survival. Massive bee die-offs would be much more concerning than, say, some random species of marmoset going extinct.
That's a huge, practical concern relating to human survival. That's precisely what I'm talking about.
Bee deaths was brought up as an issue to me recently, actually. Someone came to me with a petition about regulating neonicotinoid pesticides. The petition was full of overly dramatic language about "THIS TOXIC PESTICIDE IS HORRIBLY EVIL AND PROBABLY KILLING BABIES". Like, it's toxic... to insects, which is its intended purpose. But I actually looked into it and it did seem there was cause to investigate a possible connection between colony collapse disorder and neonicotinoids. Bees are a big pollinator and very important to US agriculture. So I signed the petition.
But I felt kind of annoyed about it, because while I bothered to look into the details of the claims, I bet almost no one else did. They just signed it because "evil science, pesticides, crying bees" nonsense.
If someone is going to try to persuade me about something, emotional appeals about crying indians aren't going to work. And I'm really annoyed that they work for lots of other people. I need something substantial, like facts or figures.
Or hell, even if the motivations purely are sentimental, then just say that. If we're talking about preserving campgrounds because camping is fun, then I'll totally sign that petition.
Just be real with me. Don't give me a lot of scary sounding words involving "destroying the environment!" or "toxic pesticides" if you don't have the facts and figures to back it up.