Hey there, Anyone interested in sharing their stories with an encounter of an invasive species being attack by a native species or vice versa with picture if possible.
Invasive eating invasive is definitely easier for me to find on iNat. Hereâs an example of one I found yesterday from Florida with an invasive giant ameiva eating an introduced brown basilisk, two species I donât find all too often on iNat, nevertheless both in the same observation! https://www.inaturalist.org/observations/147801909
And then we have the native otter Lutra lutra which seems to feed here exclusively on the introduced red crayfish Procambarus clarkii. I only find the scat, which I havenât photographed (so far). I suppose I should.
Can you find a definition of âinvasive speciesâ that doesnât mention them being from somewhere else? As in, something to do with their place of origin? I canât. Nat Geo, US DOI, US NOAAâŚnot exhaustive, but Iâm stumped! Please help.
I would use Aldo Leopoldâs definition - âA thing is right when it tends to preserve the integrity, stability, and beauty of the biotic community. It is wrong when it tends otherwise.â
Technically speaking, an organism does not need to be from somewhere else to be invasive - native species CAN be invasive. This is very rare, but it can happen.
A good example is White-tailed Deer in eastern North America. Due to a lack of predators, they are eating away entire forests and extirpating entire plant species. They are a huge problem for both forest health and human populations (since car crashes can easily cause death). If they arenât invasive, I donât know what is honestly.
Itâs a contradiction in terms. Itâs saying that something invaded an area to which it is native. Cambridge dictionary defines âinvadeâ as âto enter an area of activity in a forceful and noticeable way.â Meaning that entering is essential to the definition of invading. A native species cannot be said to be entering.
Armadillooooo
Typically considered invasive here, but here from natural spreading into new areas where they âshould notâ be. Even the freezing winters dont seem to be stopping them from spreading northward as was originally thought.
White tail deer I agree is a good example here. And then in comes chronic wasting disease. I would say they are forcibly & notably entering plenty of areas they shouldnât be.
But in any case i think thats why the phrase usually is not ânative invasiveâ but ânatives acting invasivelyâ which certainly happens when things are unbalanced.
They sound like a pest for sure. Why are they considered invasive? What is the minimum distance or obstacle that needs to be traversed or overcome before some critter is considered alien? That would surely help to define what is considered properly invasive.