Home / ESA Bulletin – September 2020 Bulletin ESA Bulletin – September 2020 Download the full September 2020 edition of the ESA Bulletin here. Or take a look at the individual articles below. In this edition: The hidden value of our urban insects Small animals, big consequences: the impacts of bushfires on Australia’s invertebrate species A recipe for building ecological niches in schools Developing ecological understanding through play Communicating ecology to children through books – the importance of tree hollows