By Cathy Warwick

A beautiful Great Horned Owl. Photo by Diane Stinson.

A few weeks ago I was leaving my house to start my walk to work and I saw a cloud of Magpies squawking wildly around a spruce tree. I ran over and was delighted to see a large Great Horned Owl! It was a lighter color than I had seen before, almost white. Its large yellow eyes looked at me wearily. The Magpies were relentlessly hassling it, flying at it and generally freaking out. I managed to get a fairly decent picture of it with my phone, and also yelled at a stranger “An Owl is in this tree!”, as one should given the special circumstances. If I saw an owl nesting I wouldn’t tell anyone, but I could tell this one was moving on soon.

The Magpies know the owl is a skilled predator that is a threat to their very lives, they don’t want it to get comfortable in our neighbourhood. Owls have very sharp beaks, crushing claws, night vision, great hearing and near silent flight, they must be terrifying to other birds. Whereas we humans just notice their super fluffy feathers and luminous, intelligent eyes. “Don’t be mean” we mutter to the Magpies and Crows harassing them.

Great Horned Owls will often roost near the trunk of a spruce tree during the non-breeding months, where they can be very hard to see. Photo by Dan Arndt.

Owls eat rodents, hares, skunks and other mammals. With their swiveling head, which can turn nearly 180 degrees in either direction, no small mammal is safe. They’ve even been known to go after house cats. I would love to see one hunting, I wouldn’t hear it though. There are numerous videos on the internet of an owl flying with a sound detector nearby, they are virtually silent. They have specialized feathers that break up the sound, a subject of much study by scientists.

If you see a very large owl it is probably one of three in Calgary: Snowy, Great Grey or Great Horned. The Great Horned Owl is the most common and is distinct because of its prominent ‘horns’ which are part of a ‘V’ coming down to its beak. Although the Long Eared owl also has feather tufts protruding from the top of its head, those owls are much harder to find in the city. Obviously the same person didn’t name these owls, one taking their tufts for horns and the other for ears. It is difficult to identify owls by colour (other than the Snowy of course), for instance the Great Horned can vary from a light colour to a tawny brown colour.

Nesting for the Great Horned is in February. The mating pair will usually steal another bird’s nest, they aren’t the apex of the birding world without some perks! After laying the eggs the female will diligently keep the nest warm for about 30 days. It probably requires a lot of energy – warming eggs through those long cold nights. Once the fluffy little owlets hatch they will stay around the nest until fall. If you know where an Owl is nesting, keep it to yourself and give them a chance to make it through their long nesting cycle.

An older Owlet, showing the last thing many mammals see. Photos by Diane Stinson.

I’m not sure if I’ll see the Owl around my house again, the Magpies are a very dominant force on our street. They seem really smug about it, if they had fingers they would be snapping them like the Jets from West Side Story. Meanwhile the owl has moved on, although they don’t migrate they can travel far for food, or to get away from Magpie gangs.

Merry Christmas and Happy New Year everyone! May you all see an owl this season.

A very young Great Horned Owlet. Isn’t it the cutest?! Photo by Diane Stinson.

The post Peak Birding – The Great Horned Owl appeared first on Birds Calgary.

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