biology 12

what is the best method useful for estimating the populations of eagles, and why?

i orginally thought counting the number of nests. but i don't know why its the best way of estimating the population.

can you plesae correct me if im wrong and help me with the reasoning.
thank you!!!

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  1. Not all eagles nest every year. Birders estimate the number of eagles by observations and banding.

  2. banding is like when you tag the bird right... so it that like mark-recapture method of getting the population

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  3. Yes.

  4. Observations of birders assigned specific areas also help estimate a bird species'population.

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