Nile crocodiles are mixing it up with alligators in the Florida swamps. Three have been identified from separate captures since 2009. Unlike alligators, they have a taste for human flesh, along with most other kinds. This is not clickbait, but a serious item from a year ago that I just discovered on CNN. Apparently Florida has become a repository for all kinds of unwanted exotic pets that have made it into the ecosystem one way or another. Giant Burmese pythons are a well-known example, but there are many others. Naturally this is less of a problem here in biosecurity-conscious New Zealand, but it is probably still prudent not to flush any funny-coloured spiders or other unusual fauna that emerge from your shopping.