Survival Through Mimicry: The Viceroy Butterfly
The survival of Viceroy butterflies in all of their life stages is significantly enhanced by mimicry. A Viceroy egg resembles a tiny plant gall. Both larva and pupa bear a striking resemblance to bird droppings. And the similarity of a Viceroy to a Monarch is well known. For years it was thought that this mimicry was Batesian in nature – a harmless organism (Viceroy) mimicking a poisonous (Monarch) or harmful one in order to avoid a mutual predator. However, recently it’s been discovered that the Viceroy butterfly is as unpalatable as the Monarch, which means that mimicry in its adult stage is technically Mullerian – both organisms are unpalatable/noxious and have similar warning mechanisms, such as the adult butterfly’s coloring.
Naturally Curious is supported by donations. If you choose to contribute, you may go to http://www.naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.
Viceroy vs. Monarch
To clarify yesterday’s post on mimicry, here are the Viceroy and Monarch, side by side. Note the horizontal black line across the hindwings of the Viceroy. The (larger) Monarch lacks this line.
Naturally Curious is supported by donations. If you choose to contribute, you may go to http://www.naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.
Naturally Curious with Mary Holland 
What Other Naturally Curious People Are Saying