There are some awesome tips. I'd like to add a few things to try to illustrate some of the things we've learned as newbies to hopefully help some others.
Look for something out of place, something that doesn't belong.
such as "why is there a white patch at the top of the tree branches?"
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walk a little slower than usual, and look around. Pause often, watch your peripherals.
eg... walking along and out of the corner of my eye, I saw a movement and thought "I don't think that was a squirrel that ran up the tree."
Just hold on for a second and sure enough....
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Do a little bit of research.
eg. the fall salmon run. I had heard about the salmon swimming up a river to spawn.
We were going to go there and check it out. I did a bit of research, and instead of
just seeing hundreds of salmon swimming in the river, we got to see this...
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Look around.... Look up.
This time of year when the trees are bare is a fantastic time to find & see nests.
Eagle nests are positively massive. Look at the top of large, sturdy trees near a river.
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You may not be able to get close to it, but at least you know where it is and may get photos of them flying in and out.
Osprey nests...
if reasonably close to a source of fish, look on top of lights at ball diamonds, soccer & football fields, hydro towers, man-made platforms.
Once you have found one, you will start to see them everywhere!
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And be patient. Look around, check everything out.
On one particular outing, I went down to a pond to check out a massive beaver lodge.
(I bet it was the size of a Grand Caravan) My "spotter" just stayed up on the main trail. Major bummer!
I snapped off a couple of photos and headed back up to the trail, in a hurry to get to the Cormorant colony. I didn't look around.
If I had, I would have noticed the wood ducks in the reeds all around the pond.
(My spotter would have scoured the shore and noticed them for sure.)
Hope these will help.
Happy shooting!