Anacondas on their natural habitat
Anacondas are usually seen in the wild, hanging out in rivers where they hide to catch prey. Therefore, you won’t be afraid that it will just show up in your house, unless you live near a jungle. Anacondas are also solitary creatures. You don’t want to startle them as they are not known to interact with humans. They are somewhat shy. Hence, you can’t easily find one. Thus, the idea that there are a lot of other huge anacondas that were not recorded could be true. They also camouflage with their environment. This makes them difficult to spot.