2021 Great Cocky Count from Cocky Notes (Birdlife Australia) Issue 33: August 2021

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Merryn Pryor Black-Cockatoo Project Coordinator

Thank you to everyone who took part in the 2021 Great Cocky Count on the 28th March this year. It was great to resume the count again this year after it was cancelled in 2020 due to Covid-19. Prior to 2020, the GCC had run consecutively for ten years from 2010 to 2019. As one of the largest citizen science field surveys in WA, the GCC would not be possible without the many dedicated and passionate volunteers who give their time to help count and monitor these charismatic birds. With over 750 people registering this year, we were able to count at 462 black-cockatoo roost sites across the south west from Chapman Valley to east of Esperance. A total of 17,773 White-tailed Black-Cockatoos (WTs) were counted across 142 roost sites, with 10,307 counted in the Greater Perth-Peel Region and 7,466 in regional areas.

A total of 6,692 Forest Red tailed Black-Cockatoos (FRTs) were counted across 161 roosts, with 5,771 counted in the Greater Perth Peel Region and 921 counted within regional areas. 255 of the 462 surveyed roost sites were occupied on the Count night, with 48 of the 255 occupied roost sites recording both WTs and FRTs, 94 recording only WTs and the remaining 113 roosts with FRTs only. The maximum size of roosting flocks was 1,982 and 689 for WTs and FRTs respectively.
35 new White-tailed Black-Cockatoo roost sites and 48 new Forest Red-tailed Black-Cockatoo roost sites were either discovered or confirmed during this year’s count. The GCC survey team at Beale Park, Spearwood.

Population trend analysis is ongoing and more details will be made available when the official Great Cocky Count 2021 report is released later in the year. The count contributes essential data to estimate and track population trends for our threatened cockies and to help identify and protect critical habitat. The next few years of the Great Cocky Count will be critical for monitoring the movements and population dynamics of Carnaby’s Black-Cockatoo as the remainder of the Gnangara Pine Plantations are harvested and cleared. Over the last five years 62% to 73% of all Carnaby’s counted on the Swan Coastal Plain during the Great Cocky Counts have been counted within these pine plantations.

Posted by kezzza4 kezzza4, September 02, 2021 06:39


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