With the discussion of de-extinction of the passenger pigeon, I thought this was an interesting and related video of how  the reincorporation of a species can change the environment around it in such drastic ways. By reincorporating the passenger pigeon into nature, many different considerations have to be taken on how the integration of this animal into the wild will affect the environment and social construction (such as the food chain and habitat location) of nature. The passenger pigeon could force other animals out of the niches they currently hold, which could cause either a positive or negative affect on the environment (such as the incorporation of invasive species). It is a very interesting topic to consider.