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Prey remains from a nest of
Magellanic (or Magellan) Horned Owl
Credit & Copyright: Dr. Bruce G.
March of 2004, I found myself climbing the side of a large rock outcrop
northeast of the town of Bariloche, southern Argentina. I was in the
steppe country of southern Patagonia, in Perito Moreno along a lagoon called
Los Juncos. On the side of the rock outcrop was sign -- drippy fecal
"whitewash" -- of an active nest of Magellanic
(or Magellan) Horned Owls.
Magellanic Horned Owls are large owls of the genus Bubo -- the same genus as the widespread Great Horned Owl of North, Central, and South America, from which the species was recently split. Magellanic Horned Owls occur in southern South America, are mostly crepuscular and nocturnal, and their behavior is little studied.
it turned out, no one was home in the nest at that time, so I collected
feathers and owl
pellets from the nest site and along the ground below the nest ledge,
and also from a second nest on another nearby outcrop called "Elephant
Rock" (which is shaped rather like an elephant from one
Two nests of Black-chested Buzzard-eagles on Elephant Rock.
Overall, these prey items I identified are typical of Magellanic HOrned Owls in this area of Argentina. Additional prey remains I found included European hares (an introduced species there) and tuco-tucos (gopher-like digging rodents).
Next week's picture: Patujú Gigante of the Amazon
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