ok,
the chance to find an animals is not the same over the year
its also depending on if you are looking for male, female, female reprodukitiv, subadult/juvenile.
so you need to use a big period of time, but that means that some of your animals are already dead
and dead animals in real make the population small, but while estimating a dead one make the population big.
whatever if you use a big period of time you get a big population size, if you use a smal you get a small pop size
so i can say I want 100 animals and calculate the timeperiod that big to get a pop size of 100 animals...
another point, if you found one specific animal you have a way bigger chance to find this again compared to the animals you found not.
and so on...so most of the rules for estimation are already broken or not?
im sure if you visit your area very often and you simply count what you see over the year and add the numbers you saw the year before and after, you get a number that is closer to the truth than with the common estimations.
maybe its possible with a very complicated estimation to get better result but finally who cares if you have 102 or 113 animals as long there is no rule about what type of land area you use to calculate the population densities?