Timing of migration and population trends of three godwit species
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Three migratory shorebird species - Latham's Snipe, Pin-tailed Snipe, and Swinhoe's Snipe - arrive in Japan in early April for breeding before departing late July through early August for Australia. Data shows these species are arriving in Australia earlier, around mid-August now compared to late August in 1950, and departing earlier, mid-April now versus late April in 1950. Population counts vary from 25,000-100,000 individuals that all overwinter in Australia, with numbers stable or declining over the last 30 years.
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Timing of migration and population trends of three godwit species
- 1. Timing of migration and population trends David Wilson (Consultant Zoologist) Ecology and Heritage Partners Pty Ltd
- 4. 3 species ◦ Latham’s G. hardwickii ◦ Pin-tailed G. stenura ◦ Swinhoe’s G. megala
- 5. Part of the East Asian-Australasian Flyway
- 7. Atlas of Living Australia Birdlife Australia Shorebirds 2020 program 700 Number of records 600 500 400 300 200 100 0 1950 1960 1970 1980 1990 2000 2010
- 8. Japan ◦ ◦ ◦ ◦ Early April - start to arrive in Japan Late April to early July – breeding Late July and early August – begin to depart Early October – last records Australia ◦ Late July – first arrivals ◦ Late May – last departures Austin and Neroda (1953)
- 10. Earlier arrival on average from 17 August in 1950 to 12 August in 2012 (8 days = 0.08 days/year)
- 11. Earlier departure on average from Australia from 27 April in 1950 to 16 April in 2012 (0.16 days/year)
- 16. 25,000-100,000 individuals (Wetlands International 2013) 36,000 (Bamford et al. 2008) All of which are assumed to overwinter in Australia Stable or declining over the last 30 years
- 18. Count 600 Powling St, VIC 400 200 0 06-Dec-99 Count 60 13-Feb-02 23-Apr-04 02-Jul-06 09-Sep-08 18-Nov-10 Edithvale Wetlands, VIC 40 20 0 14-Nov-84 07-May-90 28-Oct-95 19-Apr-01 10-Oct-06
- 19. Golo Maurer – Birdlife Australia Shorebirds 2020
- 20. Contact Details David Wilson Consultant Zoologist 0457 303 596 Adelaide - (08) 8372 7829 / Brisbane – (07) 3221 3352 Geelong – (03) 5221 8122 / Melbourne – (03) 9377 0100 www.ehpartners.com.au