Autumn Rain Boosts Bird Numbers in South Australia's Riverland

Parts of South Australia recorded their wettest weekend in months after 66 millimetres of rain fell in Renmark and more than 40 millimetres fell across other Riverland towns. The precipitation followed a prolonged dry period and allowed farmers to begin seeding while also increasing vegetation cover.

Reserve, located about 60 kilometres from Waikerie, recorded bird counts above seasonal norms. Gluepot Management Committee chairman Ian Falkenberg said 32 millimetres of rain over the weekend created conditions for an exceptional season. He reported sightings of orange chats, white-fronted chats, pink cockatoos, and elevated numbers of woodswallows, along with ducks, grebes, and herons near standing water.

Renmark-based birdwatcher Teresa ter Bogt noted higher counts of black-faced cuckoo-shrikes, honeyeaters, and striped honeyeaters in the Mallee north of Renmark. She also recorded the black-eared cuckoo for the first time in that area and observed the buff-banded rail at environmental watering sites near Bookmark Creek.

Additional species including weebills, chestnut-rumped thornbills, red-capped robins, and fairy wrens appeared in the same locations.

University of New South Wales

Centre for Ecosystem Science director Richard Kingsford said the rain activated seeds and insects, increasing food availability for multiple bird species. He added that improved body condition among birds has initiated courtship and nesting, while higher prey numbers have also prompted breeding among predatory species such as kites and owls.

Kingsford stated that a forecast dry El Niño year will likely cause many birds to relocate toward wetter south-eastern regions later in spring and summer.