Originally Posted By: dweste
Don't birds do certain behaviors when you or other predators get near their nests / eggs that tend to give them away?

Killdeer do the crippled flop around on the ground to lure you away from the nest.
A Killdeer nest is just a shallow scoop out in the gravel and the eggs are coloured to blend in with the stones.
The Killdeer flops like it has a broken wing but when you try to pick it up manages to stay just out of reach leading you away from the nest.

Most tree nesters just try to be quiet and hide out.
Crow, raven and eagle will attack you if you get too close.
Even Redwing Blackbirds try to dive bomb around your head if you get too close to their nest, but they nest in the reeds fairly low to the ground.
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Kingbirds like to sit on the top of bushes they have a nest in and sing. They nest fairly low in small bushes. When you see them singing they are likely right above their nest. They will either try ducking into the shrub and sit on the nest or attempt to divert you by flying to another bush and singing louder.
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May set off to explore without any sense of direction or how to return.