#Drosophila #Advent Day18: #Hirtodrosophila trivittata is another fungus feeder, but this is a very distinctive looking fly and seems to be a specialist on fresh oyster #mushrooms (#Pleurotus) and similar species https://www.jstor.org/stable/2408009, where they can gather in spectacularly large numbers. This species was only added to the UK list in 2008 https://dipterists.org.uk/sites/default/files/pdf/Dipterists%20Digest%202008%20Vol%2015%20No%201.pdf and I saw it for the first time in 2020 #Diptera #Fungi