Black Swan Cygnus atratus
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Supernatant – Roosting
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Vagrant. Responding to drought conditions in usual range
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Some mortalities observed at CNT. Observed to weaken then get bogged in slurry.
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Pacific Black Duck Anas superciliosa (S)
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Supernatant-roosting & feeding
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CNT: all year
TE: May-Oct
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Some mortalities.
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Grey Teal Anas gracilis (S)
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Supernatant-roosting & feeding
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CNT: all year
TE: May-Oct
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Suffers significant mortalities. Disperses after rain, returning to TSFs in dry conditions. Large flocks travel by night.
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Pink-eared Duck (S) Malacorhynchus membranaceus
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Supernatant-roosting
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CNT: all year
TE: May-Oct
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Few mortalities, although likely to be attracted to TSFs, depending on environmental conditions. Known to form large flocks if conditions suitable at CNT. Travels by night.
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Hardhead Aythya australis (S)
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Supernatant-roosting
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CNT: all year
TE: May-Oct
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Significant mortalities recorded. Low silhouette in water, frequently diving, so exposed to toxicity. Can form large flocks; attracted to deep supernatant. Can travel at night.
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Australian/Hoary-headed Grebe Tachybaptus novaehollandiae /Poliocephalus poliocephalus
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Supernatant-roosting & feeding
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CNT: all year
TE: all year
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Overlooked and mortalities grossly underestimated. Low silhouette and frequently diving. Carcasses removed by raptors and buried by slurry.
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Australian Pelican Pelecanus conspicillatus
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Supernatant-roosting
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CNT: Vagrant?
TE: May-Oct
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Some mortalities. Requires large expanses of water.
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White-faced Heron Ardea novaehollandiae
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Supernatant & slurry-Feeding
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CNT: all year
TE: May-Oct
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Regular mortalities observed. Attracted to TSFs. Solitary or in pairs.
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White-necked Heron Ardea pacifica
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Supernatant & slurry-Feeding
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CNT: all year
TE: May-Oct
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Fewer mortalities than White-faced Heron, perhaps due to lower visitation rate.
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Great Egret Ardea alba
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Supernatant & slurry-Feeding
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CNT: all year
TE: May-Oct
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The most common egret visiting TSFs during the surveys. Fewer mortalities than abundances would indicate, possibly due to feeding habitat
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Nankeen night Heron Nycticorax caledonicus
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Supernatant & slurry-Feeding
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CNT: all year
TE: May-Oct
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Very few mortalities. Nocturnal and common in vegetated areas around TSFs.
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Brahminy Kite Haliastur indus
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Carrion-feeding,
Ponding-drinking
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TE: Dec-Apr
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Drinks from ponding at sprinkler heads on heap leach pads. Generally rare visitor to mining leases in this study.
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Brown Goshawk/Collared Sparrowhawk Accipiter fasciatus/A. cirrhoceophalus
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Carrion-feeding?
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CNT: all year
TE: all year
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Not known to take carrion, mortalities have been recorded. Possibly mis-identified (for Brown Falcon?). Not expected to be attracted to TSFs.
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Wedge-tailed Eagle Aquila audax
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Carrion-feeding
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CNT: all year
TE: all year
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Possibly susceptible when feeding on large carrion on site.
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Australian Bustard Arteotis australis
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Supernatant-drinking
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CNT: all year
TE: May-Oct
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Dead on TSF wall (possibly drinking)
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Marsh Sandpiper Tringa stagnatalis (S,J,C)
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Supernatant & slurry-feeding
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CNT: Sept-May
TE: Sept-Nov, Mar-May
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Feeds in wet slurry. Possibly overlooked during passage migration. More thorough observations required.
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Common Greenshank Tringa nebularia (S,J,C)
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Supernatant & slurry-feeding
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CNT: Sept-May
TE: Sept-Nov, Mar-May
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Feeds in wet slurry. Possibly overlooked during passage migration. More thorough observations required.
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Black Kite Milvus nigrans (S)
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Carrion-Feeding.
Bare ground-roosting.
Supernatant-drinking. Thermals – soaring
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CNT: all year
TE: May-Oct
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Continually patrolling TSFs for bird carcasses (& other wildlife), and large insects embedded in slurry. Small prey items eaten on the wing or removed from slurry. Suffers significant mortalities when eating large prey items on site when exposed to toxic tailings, fumes and possibly flesh. Drinks from seepage on the outside of TSFs where mortalities have been recorded. On heap leach pads, drinks (dry season) from small ponds around irrigation heads.
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Whistling Kite Haliastur sphenurus (S)
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As for Black Kite (refer above)
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CNT: all year
TE: May – Oct (all year?)
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As for Black Kite (refer above)
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Red-necked Stint Calidris ruficollis (S,J,C)
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Supernatant & slurry – feeding
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CNT: Sept-May
TE: Sept-Nov, Mar-May
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Feeds in wet slurry. Possibly overlooked during passage migration because of small size. More thorough observations required.
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Sharp-tailed sandpiper Calidris acuminata (S,J,C)
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Supernatant & slurry – feeding
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CNT: Sept-May
TE: Sept-Nov, Mar-May
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Feeds in wet slurry. Possibly overlooked during passage migration. Because of small size and coloration. More thorough observations required.
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Black-winged Stilt Himantopus himantopus (S)
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Supernatant & slurry – feeding
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CNT: all year
TE: May-Oct
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Feeds in wet slurry. Attracted to TSFs, where almost continual mortalities recorded. Mostly found in shallow supernatant.
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Red-necked Avocet Recurvirostra novaehollandiae
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Supernatant & slurry – feeding
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CNT: all year
TE: May-Oct
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Feeds in wet slurry. Less frequently observed on TSFs compared with Black-winged Stilt, consequently suffers fewer mortalities.
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Masked Lapwing Vanellus miles
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Bare ground – feeding
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CNT: all year
TE: all year
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Common around TSFs but its feeding preference on short grassland generally does not expose it to tailings
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Oriental Pratincole Glareola maldivarum (S,J,C)
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Bare ground-feeding, Supernatant-drinking, Thermals – feeding
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CNT: Nov-Feb
TE: Oct-Nov
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Passage migrant (one way in Top End). Drinks from TSFs’ supernatant and ponding around sprinkler heads on heap leach pads
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Australian Pratincole Stiltia isabella (S)
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Bare ground-feeding, Supernatant-drinking, Thermals – feeding
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CNT: all year
TE: May-Oct
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Drinks from TSFs’ supernatant and ponding around sprinkler heads on heap leach pads
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Silver Gull Larus novaehollandiae
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Supernatant – feeding
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CNT: all year
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Usually associated with garbage dumps on mining sites. In one case a mortality identified as Silver Gull could have been a Tern species.
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Gull-billed Tern Sterna nilotica (S)
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Supernatant & slurry-feeding,
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CNT: all year?
TE: all year?
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Suffers significant mortalities. Disperses away from TSFs/dams after rain.
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Caspian Tern Sterna caspia (S)
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Supernatant & slurry – feeding
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CNT: all year?
TE: all year?
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Not common on tailings, although some mortalities recorded. More coastal in Top End.
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Whiskered Tern Chlidonias hybridus (S)
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Supernatant & slurry – feeding
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CNT: Sept-Apr
TE: Apr – Dec
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Suffers significant mortalities. Appears to prefer TSFs to natural waterholes, because of stranded or dead insects, etc. TSFs raised above the surrounding terrain apparently attracts this species, probably anti-predator behaviour.
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Cockatiel Nymphicus hollandicus (S)
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Supernatant – drinking
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CNT: all year
TE: May – Oct
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In CNT, will drink from open water bodies, such as TSFs. Occurs in large flocks after good seasons, thus susceptible to significant mortalities. In the Top End, usually travels in small flocks preferring waterholes. No mortalities recorded during this study although unquantified anecdotal information suggests that considerable mortalities may occur under some environmental conditions.
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Budgerigar Melopsittacus undulatus (S)
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Supernatant-drinking and feeding
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CNT: all year
TE: May-Oct
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In CNT, will drink from open water bodies, such as TSFs. Occurs in large flocks after good seasons, thus susceptible to significant mortalities. In the Top End, usually travels in small flocks preferring waterholes. No mortalities recorded during this study although unquantified anecdotal information suggests that considerable mortalities may occur under some environmental conditions.
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