

Experiences of invasive species?
I was recently in Lisbon, Portugal, and there are a lot of parakeets roaming around. The ones I saw and managed to snap pictures of were the Blue-crowned parakeet and the Rose-ringed parakeet. They both are invasive species to Lisbon, and I was trying to figure out how they have affected the ecosystem, but only found some research done in Seville. Does anyone have any examples of the ecosystem changing in their area due to invasive species?