Australian Field Ornithology 2019, 36, 124–129 http://dx.doi.org/10.20938/afo36124129 The importance of Hutt Lagoon and fossil river estuaries to shorebirds in mid Western Australia M.J.C. Singor¹*, Linda Giblett² and C. Heap3 ¹149a Bishopsgate Street, Carlisle WA 6101, Australia ²Unit 39, 140 Teranca Road, Greenfields WA 6210, Australia 3P.O. Box 216, Byford WA 6122, Australia *Corresponding author. Email:
[email protected] Abstract. Little is known about the dynamics of the shorebird populations of the mid Western Australian coastline between Kalbarri and Geraldton, as this area is remote and sparsely populated. We surveyed shorebirds at several sites in this region, including fossil river estuaries from intermittent rivers (Hutt, Bowes and Greenough Rivers) and wetlands on the western shoreline of Hutt Lagoon and around Port Gregory. Totals of 21 migratory shorebird species and 9 Australian-breeding shorebird species were recorded from 64 visits in 2006–2010 and 87 visits in 2017–2018. The highest counts related to Banded Stilt Cladorhynchus leucocephalus (652), Red-capped Plover Charadrius ruficapillus (300) and Red-necked Stint Calidris ruficollis (300). The highest numbers of most species were recorded at Hutt Lagoon and associated semi-permanent wetlands near Port Gregory, with mean counts in 2017–2018 of 109 migratory shorebirds (mainly Red-necked Stints) and 227 Australian-breeding shorebirds (mainly Banded Stilts), from the accessible part of that wetland system. This shows the importance of such wetlands in providing shorebird habitat in the region. None of the wetlands met criteria for international importance. Introduction There is a large stretch of the Western Australian coastline, from Geraldton (425 km north of Perth) to Kalbarri (167 km north of Geraldton), for which little information on shorebirds is available.