One challenge is cost. To effectively monitor populations in the wild, scientists need special equipment such as cameras, computers, and GPS monitoring equipment. Another challenge is accuracy. It’s impossible to count every single organism in an ecosystem, so scientists often work with estimates.
1 - Weather. If scientists are monitoring organisms in their natural environments, than the weather conditions may not be fit to their equipment, clothing, etc. For instant, if it was a rainforest where rain is common, a challenge would be to get good visuals on the organisms.
2 - Aggressiveness. If scientists were to monitor organisms that are new or that they know nothing about, they could unintentionally aggravate the organism or those around them in the wild. In this situation, the aggravation could lead to destruction of data or equipment and lead to a possible set up in the observation.
