There are many correct responses here, but here is a list of potential responses:
Advantages of research on wild populations:
- Ability to observe a full range of natural behaviours
- Can investigate the relationship between specific behaviours and the natural ecology, habitat, and weather
- Can investigate the free movement of the species and how the animals interact with one another.
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Disadvantages of Field studies vs captive studies:
- a lot of energy is spent just trying to find the animal and keep up with its movement through the ecosystem.
- the habitat/individual might prevent you from getting close enough to observe all the behaviours accurately
- identification of the individual can be challenging
- habituation takes a long time before individuals begin acting naturally in the presence of observers.
- the life history of the individuals studies are unknown.
- much less control over the variation of environmental factors makes experimentation much harder to replicate
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