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RMOT 101 Nocturnal Raptors


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[Front]


Strigiformes characteristics
[Back]


• Large heads and flattened faces (facial disks) – Eyes on front of the head – Can rotate head 270o – Asymmetrical ears for better directional hearing • Fluffy plumage – Wings act as “baffles” for silent flying • Primarily nocturnal • Regurgitate pellets

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RMOT 101 Nocturnal Raptors - Detalles

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Strigiformes characteristics
• Large heads and flattened faces (facial disks) – Eyes on front of the head – Can rotate head 270o – Asymmetrical ears for better directional hearing • Fluffy plumage – Wings act as “baffles” for silent flying • Primarily nocturnal • Regurgitate pellets
What are the 2 families of owls? Which of them is the only one in the first family?
Tytonidae and Strigidae Barn owl is the only owl in Tytonidea
Barn owl characteristics
• Distinctive “heartshaped” facial disk • Dark eyes • Long legs
Barn owl habitat, distribution and status
• Found in agricultural areas – Lower Fraser,south VI – Blue-listed • Increasing urbanization of rural areas
Great horned owl characteristics
• Large size • Long ear tufts outside of eyes • Dark brown body, white throat patch
Short eared owl characteristics
• Medium size • Ear tufts above eyes — Short, difficult to see • Eyes circled with black • Dark wrist patches – Visible in flight
Short eared owl distribution, habitat and status
• Throughout BC – Open areas – Esp. Fraser River delta – Blue-listed
Long-eared owl characteristics
• Medium size • Ear tufts above eyes – Long and close together • Orange-brown facial disk
Long-eared owl disribution
Southern half of BC
Western screech owl characteristics
• Small size • Ear tufts outside of eyes • Gray-brown body – Bark marking
Western screech owl distribution and status
• Southern BC – Coastal = blue-listed • Is not on Haida Gwaii – Interior = red-listed
Flammulated owl characteristics
• Small size • Small ear tufts – Outside of eyes • Dark eyes
Flammulated owl distribution, habitat and status
• Thompson-Okanagan – Mature forest – Blue-listed
Snowy owl distribution, habitat, and status
• Throughout BC in winter – Breeds on Arctic tundra – Blue-listed
Snowy owl feeding and behaviour
• Diurnal – Feed on lemmings
Great grey owl characteristics
• Largest owl in BC • Mostly all gray – Large facial disk with rings • White “bow-tie” on throat
Geat grey owl distribution
• North, south Interior – Uncommon
Northern hawk owl characteristics
• Medium size with long tail • Whitish facial disk edged in black sideburns • Diurnal
Northern hawk owl distribution
• East of Coast Range – More common in the north
Burrowing owl characteristics
• Medium size • Long naked legs
Burrowing owl distribution, habitat, and status
• Thompson-Okanagan – Grasslands – Red-listed • Recovery ongoing
Burrowing owl behaviour
• Diurnal – Perch on the ground or fence posts • Nests in burrows – Dig their own or used ones from badgers or ground squirrels – Nest in colonies • Juvenile alarm call – Mimics a rattlesnake
Boreal owl characteristics
• Small size • Yellow bill • White spots on forehead
Boreal owl distribution
• East of Coast range – More common in northern forests
Northern Saw-whet owl characteristics
• Small size • Dark bill • Buffy streaks on forehead
Northern Saw-whet owl distribution and status
• Throughout south BC – Migratory, except Haida Gwaii (blue-listed)
Northern Pygmy-Owl characteristics
• Very small size • Long barred tail • Small spots on forehead • Black false eye spots on back of head • Yellow bill
Northern Pygmy-Owl distribution and status
• Throughout south BC – VI: blue-listed
Barred owl characteristics
• Large size • Gray-brown with vertical streaks on belly • Dark eyes
Barred owl distribution
• Throughout BC – Range is expanding • 1969: First sighting on VI • Now very common
Spotted owl characteristics
• Large size • Rich brown – Spotted belly • Dark eyes • Can hybridize with barred owl
Spotted owl distribution, habitat, and status
• Southwest BC mainland – Mature Douglasfir forests – Red-listed • <30 birds left