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Bird Surveys in Selected Perth Metropolitan Reserves

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Bird Surveys in Selected Perth Metropolitan Reserves Bird surveys in selected Perth metropolitan reserves A joint biodiversity conservation project between Birds Australia WA and the Perth Biodiversity Project C.A. Gole August 2003 Birds Australia WA 167 Perry Lakes Drive Floreat Park WA 6014 Tel: 08 9383 7749 Email: [email protected] Perth Biodiversity Project 15 Altona Street West Perth WA 6005 Tel: 9213 2047 Email: [email protected] Bird Surveys in Selected Perth Metropolitan Reserves: Part A Bird surveys in selected Perth metropolitan reserves A joint biodiversity conservation project between Birds Australia WA and the Perth Biodiversity Project Part A: Main Report C.A. Gole August 2003 Photographs on Front Cover –The photos of the Splendid Fairy-wren and White-browed Scrubwren were taken by Ray Edwards and photos of Harry Sandon Reserve were taken by Niel Adams. Many thanks. Bird Surveys in Selected Perth Metropolitan Reserves: Part A ACKNOWLEDGEMENTS The bird surveys project in selected Perth Metropolitan Region reserves was initiated by staff from the Perth Biodiversity Project and developed in conjunction with Birds Australia WA. The project was coordinated by Birds Australia WA project officer Cheryl Gole and conducted with the assistance of a large number of volunteers. Volunteer observers from Birds Australia WA undertook the bird surveys at all project sites. The following people contributed time and expertise in this way: Eleanor Adams, Niel Adams, George Agar, Pam Agar, Des Agnew, Pam Agnew, Max Bailey, Wes Bancroft, Phyllis Bentley, John Blyth, Judy Blyth, Audrey Bolger, Mary Bremner, Gary Brophy, Gisela Cannon, Lorraine Chyne, Richard Chyne, Kate Creed, Sarah Crook, Tom Delaney, Karl Edwards, Carole Elliot, Stewart Ford, Rob Gilham, Linda Glass, Cheryl Gole, Martin Gole, Ruth Greble, Julia Gross, Barbara Henderson, David Henderson, Cora Keil, Nancy Kennedy, Sue Keogh, Dot Kingston, Sally Lake, John Lauri, Romeny Lynch, Wynton Maddeford, Jodi Mansell-Fletcher, Susan Margaret, Paul Marty, Rob Mather, Sue Mather, Dudley Maier, Brendan Metcalf, Clive Napier, Wendy Napier, Brenda Newbey, Annette Park, Maurice O'Connor, Alyson Paull, Edward Paull, Kellie Plant, Jane Prince, Eunice Pyper, Steve Reynolds, Jeff Richardson, Jan Rogers, Chris Ros, Tom Spalding, John Stewart, Barbara Stoneman, Trevor Stoneman, Sean Van Alphen, Dorothy Van Wees and Hank Van Wees. Steve Spiker and Syed Sohel designed the project's relational database as part requirement towards a Masters Degree in Geographic Information Science at Curtin University. Steve Spiker wrote the queries and continued to advise on database maintenance and design and Kate Gole entered the project data. Greg Harewood drafted successive versions of the site location and bird species distribution maps. Remnant vegetation mapping was made possible by the use of Perth Bushland Mapping 2001 data. This was made available by the Department of Agriculture and the Department for Planning and Infrastructure. The Department of Land Information supplied mapping information on local government boundaries. Assistance with the provision of Bird Atlas survey data was given by Andrew Silcocks at the Birds Australia national office in Melbourne. Staff at a number of local government offices provided aerial maps of reserves and bird survey information from existing management plans. Ryan Taylor (Perth Biodiversity Project) identified the relevant vegetation complexes and local remnant vegetation numbers. Michael Brooker and Andrew Huggett (CSIRO Sustainable Ecosystems), John Dell (Department of the Environment) and Kate Savage (Perth Biodiversity Project) commented on a draft of the report. Members of the Birds Australia WA Conservation and Research Committee commented on project development and design. The bird surveys component of the Perth Biodiversity Project would not have been possible without the participation, assistance and enthusiasm of so many people. To all, I am most grateful. Bird Surveys in Selected Perth Metropolitan Reserves: Part A EXECUTIVE SUMMARY The Perth Biodiversity Project (PBP) is a local government initiative to establish and improve the existing frameworks for biodiversity conservation in local natural areas in the Perth Metropolitan Region. Local biodiversity areas consist of bushland and other natural and revegetated areas outside Bush Forever and the Department of Conservation and Land Management conservation estate. Increasing urbanisation in the Perth Metropolitan Region has led to a process of habitat loss, fragmentation and degradation of native vegetation. These broad threatening processes have been followed by a well-documented local and regional decline and extinction of bird species. Between July 2002 and May 2003, bird surveys were undertaken by Birds Australia WA volunteers in selected reserves in the Perth Metropolitan Region. The purpose of this ongoing component project of the PBP is to undertake an inventory of the bird species of selected reserves vested in local councils and, where possible, link bird species information with conservation and management strategies. It also aims to help raise awareness of biodiversity conservation among participating local governments. The project aimed to survey all sites for one year. Thirty nine sites with a total area of more than 400 ha were surveyed by 68 observers. Most sites (75%) were 10 ha in size or smaller; sites ranged in size from 0.74 ha to 70 ha. A total of 125 bird species was recorded for the project, of which 41 (33%) are regarded as having conservation significance by Bush Forever. While more species, and more significant species, were recorded in large reserves, wetlands and Darling Range sites, significant bird species were recorded at almost all sites (95%). This suggests that even small reserves on the Swan Coastal Plain have conservation value for birds. The number of bird species recorded at individual reserves ranged from 61 for a medium-sized wetland reserve to 5 for a small, recently isolated bushland remnant. The number of significant bird species recorded at individual reserves ranged from 19 at a grazed wetland site with intact overstorey, relatively close to the Darling Range, to zero for three small, isolated bushland remnants. The endangered Carnaby's Black-Cockatoo was recorded at nine sites, some of which are small, isolated bushland remnants. The retention of these bushland remnants as corridors and resources for mobile bird species such as Carnaby's Cockatoo is important for the long-term survival of similarly mobile species on the Swan Coastal Plain. For each site, a comprehensive list of bird species was compiled and management recommendations were made to maintain or improve the conservation value of the reserve for birds. Management recommendations included the necessity at a number of sites for the staged removal of woody and other weeds that might provide habitat for small insectivorous birds. The general principles mitigating the effects of local threatening processes on urban bushland remain valid for birds. The bird surveys project is an observation-based study identifying patterns in the distribution of birds in some urban and peri-urban reserves. During the project, a considerable body of bird survey data has been generated for a number of remnants for which consistent and reliable survey data are otherwise not available. The results provide a baseline against which future changes in bird species distributions might be evaluated and show that the use of volunteer observers provides a cost-effective, valid and reliable inventory of most birds in urban reserves. Bird Surveys in Selected Perth Metropolitan Reserves: Part A TABLE OF CONTENTS TABLE OF CONTENTS............................................................................................i INTRODUCTION .....................................................................................................1 METHODS ................................................................................................................2 RESULTS ..................................................................................................................7 Survey sites ............................................................................................................7 Surveys...................................................................................................................9 Bird species............................................................................................................9 Threatened species ...............................................................................................10 Other significant species ......................................................................................10 Breeding species ..................................................................................................11 DISCUSSION..........................................................................................................11 CONCLUSION........................................................................................................14 REFERENCES ........................................................................................................15 APPENDICES .........................................................................................................19 Appendix 1: Project overview and survey instructions provided to observers undertaking bird surveys for the Perth Biodiversity Project in the Perth Metropolitan Region July 2002-May 2003..........................................................19
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