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Threatened Species Nomination Form

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Threatened Species Nomination Form 2010 NOMINATION – Falco subniger Section 1 - Legal Status, Distribution, Biological, Ecological Conservation Theme 1. The conservation themes for the The species’ breeding habitat or nest sites potentially include assessment period commencing mallee woodlands near open country 1 October 2010 (for which nominations close 25 March 2010) are ‘heathlands and mallee woodlands’, and ‘terrestrial, estuarine and near–shore environments of Australia’s coast’. How does this nomination relate to the conservation themes? Taxonomy 2. What are the currently accepted Black Falcon- Falco subniger scientific and common name/s for the species (please include Indigenous names, where known)? Note any other scientific names that have been used recently. Note the species authority and the Order and Family to which the species belongs (Family name alone is sufficient for plants, however, both Order and Family name are required for insects). 3. Is this species conventionally Yes accepted? If not, explain why. Is there any controversy about the taxonomy? 4. If the species is NOT conventionally accepted, please provide: (i) a taxonomic description of the species in a form suitable for publication in conventional scientific literature; OR (ii) evidence that a scientific institution has a specimen of the species and a written statement signed by a person who has relevant taxonomic expertise (has worked, or is a published author, on the class of species nominated), that the person thinks the species is a new species. 5. Is this species taxonomically distinct Australian endemic species in a global genus and family (Taxonomic distinctiveness – a measure of how unique a species is relative to other species)? Legal Status 6. What is the species’ current Vulnerable under the Victorian Advisory List; under review for conservation status under Australian possible listing as Vulnerable in NSW (NSW Scientific Committee) and State/Territory Government legislation? 7. Does the species have specific No, other than CITES II protection (e.g. listed on an annex or appendix) under other legislation or intergovernmental arrangements, e.g. Convention on International Trade in Endangered Fauna and Flora (CITES), Convention on Migratory Species (CMS). Description 8. Give a brief description of the species’ The Black Falcon is a large (45-55 cm), very dark falcon with pale appearance, including size and/or grey cere (enclosing the nostrils), eye-rings (around dark eyes) and weight, and sex and age variation if feet. It is uniformly dark brown to sooty black, with a pale throat appropriate; social structure and and indistinct black streak below the eyes; some individuals have dispersion (e.g. solitary/clumped/flocks). faint, narrow barring under the wings and tail. The dark form of the Brown Falcon Falco berigora is sometimes mistaken for the Black Falcon; it is similarly uniformly dark brown with pale grey cere, eye- rings and feet (dull yellow in old males), but has a double cheek- mark, long legs, bicoloured, barred underwings, and slow flight. The Black Falcon occurs solitarily, in pairs, or in family groups of parents and offspring. Individuals may congregate at food sources (e.g. fires which expose prey, irruptions of quail or button-quail, and locust plagues). 9. Give a brief description of the species’ High-order predator of birds ecological role (for example, is it a ‘keystone’ or ‘foundation’ species, does it play a role in processes such as seed dispersal or pollination). Australian Distribution 10. Describe the species’ current and Thinly distributed over most of the Australian mainland except the past distribution in Australia and, if eastern humid coastal and escarpment forests. Little or no change available, attach a map. in distribution at the continental scale. Map available in , e.g., Barrett et al. (2003). 11. What is the extent of occurrence (in Potentially ~70% of mainland Australia or ~5 million km2, based on km2) for the species (described in distribution of records for the species in the two national bird Attachment A); explain how it was atlases. calculated and datasets used. a. What is the current extent of A above occurrence? b. What data are there to indicate past No evidence for past declines in EEO declines in extent of occurrence (if available, include data that indicates the percentage decline over the past 10 years or 3 generations whichever is longer)? c. What data are there to indicate None future changes in extent of occurrence (if available, include data that indicates the percentage decline over 10 years or 3 generations whichever is longer (up to a maximum of 100 years in the future) where the time period is a continuous period that may include a component of the past)? 12. What is the area of occupancy (in Unknown, but given the generally low densities of this species km2) for the species (described in possibly 10% of EEO or ~500 000 km2. Attachment A); explain how calculated and datasets that are used. a. What is the current area of Unknown with any precision. occupancy? b. What data are there to indicate past Could be inferred from decline in index of abundance (see Q. 27). declines in area of occupancy (if available, include data that indicates the percentage decline over the past 10 years or 3 generations whichever is longer)? c. What data are there to indicate Future changes in AOO can be inferred from the fact that a 30-50% future changes in area of decline in index of abundance occurred over only two generations occupancy (if available, include data that indicates the percentage in the eastern sheep-wheat belt and Murray-Darling Basin, where decline over 10 years or 3 natural ecosystems are under severe threat. generations whichever is longer (up to a maximum of 100 years in the future) where the time period is a continuous period that may include a component of the past)? 13. How many natural locations do you Difficult to define a ‘location’ for this highly mobile, nomadic or consider the species occurs in and why? migratory (within Australia) species that can appear over any open Where are these located? habitats across the country. If one equates ‘locations’ with IBRA The term 'location' defines a geographically or bioregions, then it potentially occurs in at least 50 of the 80 ecologically distinct area. bioregions. 14. Give locations of other Not applicable populations: captive/propagated populations; populations recently re- introduced to the wild; and sites for proposed population re-introductions. Note if these sites have been identified in recovery plans. 15. Is the species’ distribution severely No fragmented? What is the cause of this fragmentation? Describe any biological, geographic, human-induced or other barriers causing this species’ populations to be fragmented. Severely fragmented refers to the situation in which increased extinction risk to the taxon results from most individuals being found in small and relatively isolated subpopulations (in certain circumstances this may be inferred from habitat information). These small subpopulations may go extinct, with a reduced probability of recolonisation. 16. Departmental Use Only: Global Distribution 17. Describe the species’ global Endemic to mainland Australia. distribution. 18. Give an overview of the global Not applicable: the Australian population is the global population. population’s size, trends, threats and security of the species outside Australia. 19. Explain the relationship between N/A the Australian population and the global population, including: a. What percentage of the global 100% population occurs in Australia; b. Is the Australian population distinct, geographically separate or does part or all of the population move in/out of Australia’s jurisdiction (give an overview; details in Movements section); c. Do global threats affect the Australian population? Surveys and Monitoring 20. Has the species been reasonably The only comprehensive surveys have been the national bird well surveyed? atlases in 1977-81 and 1998-2001 (Blakers et al. 1984; Barrett et al. Provide an overview of surveys to date and 2003), and the two national Bird of Prey Watch schemes in 1986- the likelihood of its current known distribution 1990 and 1996-2000 (Baker-Gabb & Steele 1999; Steele & Bake- and/or population size being its actual distribution and/or population size. Gabb 2009). There is a high likelihood that its current known distribution is its actual distribution, although records may be inflated by misidentified dark Brown Falcons. 21. For species nominated as extinct or extinct in the wild, please provide details of the most recent known collection, or authenticated sighting of the species and whether additional populations are likely to exist. 22. Is there an ongoing monitoring No programme? If so, please describe the extent and length of the programme. Life Cycle and Population 23. What is the species’ total population Not precisely known for this species. As an approximation, the size in terms of number of mature global population was estimated as in the low tens of thousands to individuals? How were population below 100 000 birds (Ferguson-Lees & Christie 2001). However, estimates derived and are they reliable? this estimate was made in the 1990s (pre-calicivirus reduction of Are there other useful measures of rabbit prey) and may require revision downwards, given that the population size and what are they? In the absence of figures, terms such as common, national reporting rate has declined by 38% since the 1980s (XXXX abundant, scarce can be of value. XXXX pers. comm.). The national population may be about 30 000 birds. It is a scarce species. 24. Does the species occur in a number No of smaller populations? How many? For each population give the locality, numbers and trends in numbers and tenure of land (include extinct populations). Can these be considered to be subpopulations and why? Subpopulations are defined as geographically or otherwise distinct groups in the population between which there is little demographic or genetic exchange.
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