Ants as well

mosquitoes too, though it pains me to give them credit for anything

My magnolia is the only thing that seems to attract honeybees, which I rarely see otherwise. The article doesn't seem to justify the "not bees" part, though. I'd imagine bees can pollinate them too.

Right, the whole point of bees as insect pollinators (reflecting that they are recent evolutionary line) is that they are by a healthy margin the most intelligent arthropod. They will inspect then successfully pollinate anything floral over a wide geographic range. Most insect pollinators are instinctually tied to certain species/families.