Analyse real survey photos from your own balcony or porch, works from any state, no travel required. Visit https://greatreefcensus.org

Record frog calls from your backyard on your phone, any time of year. Visit https://www.frogid.net.au

Point your phone's camera at any plant, animal, fungus, or insect and get an instant AI identification suggestion, then a global community of naturalists confirms or refines it. Free, usable literally any day, not tied to a set event, and it works for absolutely anything you spot, not just one species group. Managed nationally through the Atlas of Living Australia. Visit https://www.inaturalist.org

A national citizen science project built specifically for recording butterfly sightings. The free app includes an offline field guide to help identify what you've found, then submits your sighting to a database used for conservation research. Visit https://butterflies.org.au