RMOT 101 Nocturnal Raptors
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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 |