Which of the following is not a basic characteristic used for animal identification?

In the context of identifying animals, color is often utilized, but it is not a basic characteristic relied upon for accurate identification. While color can be a defining trait for some species and may assist in differentiation, it can vary widely within a species, making it less reliable for clear identification.

Distinctive markings, on the other hand, provide more reliable identifiers as they often remain unique to individual animals or specific breeds. Sounds can also be important in identifying certain species, particularly in the case of birds or mammals, where vocalizations can signal species or even individual recognition. Group behavior can indicate social structures or types of animals but is less about individual identification.

By focusing on distinctive markings and sounds, you're utilizing more consistent and identifiable features that remain less variable across individuals, making them stronger tools for animal identification.