The Ides Of March
Conservation status: Least Concern
Classification: Non-native, non-invasive
This meme population has persisted in the pre-internet ecosystem since 44 BC, but for over a millennium the meme remained at very low population levels. Introduction to the theater habitats of England in approximately 1599 by an early meme ecologist (also notable for the introduction of such memes as Damned Spot and To Be Or Not To Be) caused a population boom that has led to the continued stable population of Ides of March despite the extinction or near extinction of the Ides of other months and all known Nones and Kalends.
The Ides Of March, like many other calendar memes such as April 25th (The Perfect Date), Thursday The 20th, and It's October 3rd, has a life cycle that can confuse amateur memeologists. These memes benefit greatly from the presence of scheduled posts in the ecosystem, appearing absent until their highly specific time, when the memes all bloom simultaneously and dominate the dashes of many users.