On Anthropomorphism: Ladybug playing?

Just so nobody accuses me of bias I’m going to begin with an example of anthropomorphism that is pretty benign, and could help people identify sympathetically with insects.

There has already been some controversy over whether the ladybug (or ladybird, as Ian puts it) is playing with or trying to eat the sprinkles as you can see under any comment thread showing this video. But I decided to get an expert opinion. My friend Barrett Klein who has studied entomology in depth offered this explanation:

It is often too tempting and too easy to ascribe human behaviors to nonhuman animals.

At times, it can also be inappropriate, as with this case of a beetle presumed to be playing with sprinkles.

Although many nonhuman animals exhibit play behavior and this behavior can serve as an invaluable means of preparing for future challenges, this beetle is most likely on the search for viable edibles.  Ladybird beetles are voracious aphid predators and the sprinkles may fall within the aphid size range to warrant the beetle’s inspection.

I suspect we are witnessing a motivated (ie, hungry) predator responding to reasonably comparable stimuli by handling sprinkles as potential prey items.

Watching the video myself I thought that rather than having a joyful experience this beetle might be profoundly frustrated. Ladybugs can eat thousands of aphids in their 3-6 week life. Ever seen the dessert tray of a restaurant with surprisingly realistic looking plastic cakes and pies? Imagine pies were all you ate and you were hungry in a room full of plastic pies, or -as Ian offers – that you are on a street full of Asian restaurants but they all put honey in their stir fry.

Play behaviour is difficult to define but also pretty rare and, as far as I have seen, undiscovered in insect species. But ladybugs have been found to have an incredible ability that aids in their hunt for food.

Williams and Flaxman recently found (original paper) that ladybug beetles are able to do something that no other species has been scientifically proven to do. The scientists used a compound to toughen up the stems of plants that aphids commonly feed on. Because aphids drink plant juices they prefer softer skinned plants. Ladybugs were found to prefer the plants with the softer stems even when there were no aphids on them. As the authors conclude “While expected from theory, it is nevertheless surprising that the predators we studied were actually able to detect and use information about the quality of a resource they did not consume.”

Ladybugs’ cute colourful round appearance and the fact that you can’t see fangs or any other clues to their predatory nature cues our anthropomorphic tendencies to infer that their motivations are cute and cuddly as well.  To an aphid a ladybug is just as threatening as any lion and science has shown they can do something a lot more complicated than waiting by the watering hole for a wildebeest.

CC-BY

About Diana

My two greatest ideological passions are the pursuit of an understanding of human nature and ethics towards nonhuman animals. I use my scientific understanding and my training as an experimental psychologist to shed some light on the topics we tackle. I'll also introduce a generous helping of irreverent American humor. Read more ...

Trackbacks / Pingbacks

  1. Ladybird beetles | Country By Design's Blog - April 27, 2012

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: