Very interesting article. I can't help but question the involvement of a philosophy professor in this type of study, or at least the apparently major role she plays. It seems interesting that while apparently admitting that they can't quantify or define consciousness in humans...they make the huge reach to suggest its existence in bees and other invertebrates.
Stating that something is "at least a realistic possibility" is disturbingly close to the sort of marketing-speak that uses terms like "up to 75% off sale". The latter means that as long as the store has one single item, perhaps a scratch'n'dent old stock thing, that is marked down to that level...they can legally say "up to" 75% off. It's about as meaningful as stating that something is "at least a realistic possibility".
We can't even agree upon a definition of "consciousness" or "sentience"...which of course means that we can't prove or disprove its existence in any particular example...so that means that there is a "realistic possibility" that it exists in all examples.
I'm having a chuckle...an internal one!...at the thought of a group of philosophers and assorted other professional navel gazers clustered around a table, watching a bumble bee wrestling with a wooden ball. I can imagine their efforts to assign some deep metaphysical significance to the display; meanwhile, the bee is trying to find a soft spot to sting...
Those folks are doing their best to move the goalpost, the line that distinguishes a conscious entity from one that is not. They want to push it further and further down the evolutionary scale, to eventually include all animals. I think it might be more realistic to look at ourselves, and consider that the magic line separating conscious from...not conscious...is possibly far above humans. We might very well be lumped together with all those bees and other critters. i.e. just dumb animals.
That would explain a lot.