The species is generally solitary; one study showed only 8% of its active time was spent near other individuals.

They are generally solitary or found in small groups of two or three.

They are generally solitary and have excellent hearing and vision.

Although generally solitary, the bond between a breeding pair is often considerably close.

They are generally solitary with the strongest bonds between mother and calf.

It is generally solitary, although occasionally seen travelling in pairs.

Though generally solitary, it will gather in small loose groups at favored feeding areas.

Adult American marten are generally solitary except during the breeding season.

They appear to be generally solitary, but may roost in small groups of three or so individuals.

Adult males are generally solitary, except for mating and fighting.