^
You got that right. You have to know where to look for certain birds and learn when and where they migrate. I live in Vancouver, British Columbia, Canada. It's right along the Pacific Flyway, which is a major north to south route of travel for migratory birds in North America, extending from Alaska to Patagonia. Many species of birds migrate every year to travel some or all of this distance both in the Spring and in the Autumn season, following food sources, heading to breeding grounds or travelling to overwintering sites.
You can spot many birds during the Winter season of British Columbia and most wildlife photographers and bird watchers make the most of it as the second Spring comes around most birds just seem to disappear, especially the Owls. They migrate to the next spot but they'll be back.
If you don't have a super telephoto lens then you need to be patient when it comes to birds. I've been going to the same spot to capture a few photos of that Short-Eared Owl and it was pure luck that I was able to get a full frame shot but I was consistent and super determined to get the photo I wanted. Hence, being there as much as I can for the past three weeks.
When I took the photo of the Owl looking straight at me, everyone was watching a Peregrine Falcon but I heard the Short-Eared Owl call a few feet to the left of me. I looked around and there it was, less then eight feet away. So I slowly took a few steps back so I don't invade its space and I snapped one with my 70-300mm VR. I still visit that particular area in order to capture a better photo of the bird when its sitting on a fence post.
Look closely at the owls feet, you can see it caught a little vole or perhaps its a mouse. If I was only 5-7 feet over to my left I would of had the best shot of the day but the second I thought about slowly moving over, the Owl flew down to the bottom of the fence and hid itself to enjoy its meal.
I find birding to be super intense yet very satisfying, plus I truly enjoy the great outdoors so its a good way for me to get some exercise, fresh air and use my camera. I recommend birding to everyone but definitely show your respect and try not to scare them. There was an article in a local newspaper where a lady set her dog on one of the Snowy Owls that migrated here in order to capture a photo of the Owl in-flight. So just like Cheese&Apple said, people will wait for hours in order to capture a in-flight photo, others not so much.
Sorry for rambling on haha. Feel free to message me if you want to chat.