PSL - the debate
From my folder marked 'Mystery Pictures' - best left to the experts... He may not have kicked over a hornet's nest exactly, but Seth Gibson's recent blog post on Pan-species Listing (PSL) ( you can read it here ) has certainly stirred up a bit of debate on social media (including a blog post from Alastair Forsyth which you can read here ). This is my contribution to the conversation. I think I can safely say that I was in at the start of the whole PSL movement. I had, just like Seth, independently started to collate a list of every living organism that I had recored in the UK and, just like Seth, this was primarily a lumping together of my bird, plant, butterfly, moth and dragonfly lists plus a handful of obvious others (ie Stag Beetle, Pike, Fox, you get the picture). My non-core identification library was scant and woefully inadequate, but it was all that I had to use - remember, these were pre-internet days! If I saw a wasp, fly, beetle or fungus, I took my basic ide...