Swamp Harrier
Photo © William Harland
Photo © William Harland — CC BY 4.0 — Source: iNaturalist #293044688The swamp harrier (Circus approximans), also known as the Australasian marsh harrier or Australasian harrier, is a large, slim bird of prey widely distributed across Australasia. In New Zealand, it is also known by the Māori name kāhu. It arrived in New Zealand within the last 700 years, replacing the larger species, the extinct New Zealand endemic Eyles's harrier. The swamp harrier belongs to the subfamily Circinae and genus Circus, which are represented worldwide, except Antarctica. The subfamily and genus are derived from the characteristic behaviour of circling flight during courtship and hawking. == Description == The swamp harrier is largely dark brown, becoming lighter with age, and has a distinct white rump. It hunts by flying slowly, low to the ground, on upswept wings. The body length is 48 to 62 cm (19 to 24.5 in), and the wingspan is 118 to 145 cm (3 ft 10 in to 4 ft 9 in). The recorded weights of adults range from 580 to 1,100 g (1.28 to 2.43 lb). Females are significantly larger than the males. In New Zealand, 54 males averaged 640 g (1.41 lb) and 66 females averaged 870 g (1.92 lb). Going on mean weights and linear…
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+146 birds+10 mammals
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+124 birds+3 mammals
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+273 birds+46 mammals
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+362 birds+37 mammals
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+202 birds+8 mammals
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+229 birds+12 mammals
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+164 birds+11 mammals
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VIEW NATIONAL PARKLower Glenelg National Park
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+161 birds+12 mammals
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+137 birds+7 mammals
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+195 birds+25 mammals
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+227 birds+24 mammals
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+203 birds+26 mammals
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+296 birds+46 mammals
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+200 birds+11 mammals
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+149 birds+5 mammals
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+143 birds+5 mammals
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+141 birds+10 mammals
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+211 birds+9 mammals
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Australia
+78 birds
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VIEW NATIONAL PARKEndeavour River National Park
Philadelphia, Australia
+203 birds+1 mammals
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+258 birds+7 mammals
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Australia
+193 birds+21 mammals
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Australia
+253 birds+57 mammals
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+284 birds+20 mammals
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Australia
+142 birds+14 mammals
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Australia
+210 birds+21 mammals
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Fitzgerald River National Park, Australia
+209 birds+11 mammals
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Australia
+175 birds+15 mammals
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Australia
+186 birds+27 mammals
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Australia
+306 birds+40 mammals
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Australia
+231 birds+10 mammals
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Australia
+240 birds+28 mammals
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Marcus Beach, Australia
+216 birds+8 mammals
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Australia
+220 birds+43 mammals
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Australia
+211 birds+52 mammals
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Sydney, Australia
+216 birds+39 mammals
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Australia
+175 birds+47 mammals
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Gleniffer, Australia
+172 birds+17 mammals
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Australia
+135 birds+7 mammals
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Australia
+202 birds+45 mammals
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Eden, Australia
+255 birds+47 mammals
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Australia
+214 birds+18 mammals
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Australia
+255 birds+42 mammals
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Myrtleford, Australia
+124 birds+7 mammals
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VIEW NATIONAL PARKMurray-Sunset National Park
Australia
+205 birds+2 mammals
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Port Campbell, Australia
+170 birds+7 mammals
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Australia
+217 birds+15 mammals
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Australia
+157 birds+6 mammals
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Grey, Australia
+124 birds+2 mammals
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Australia
+159 birds+15 mammals
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Australia
+149 birds+7 mammals
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Coles Bay, Australia
+115 birds+9 mammals
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VIEW NATIONAL PARKTasman National Park
White Beach, Australia
+53 birds+3 mammals
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