Cooney Creek, Swan Valley, Condon, Montana, USA Dynamic video of Brook trout and large Westslope Cutthroat Trout actively swimming in front of the camera. A large adult Westslope Cutthroat Trout with strange colouration on its head due to past injuries displays dominance towards smaller fish

Cooney Creek, Swan Valley, Condon, Montana, USA An adult Westslope Cutthroat Trout patrols in front of the camera chasing away all smaller Cutthroat Trout and Brook Trout during the afternoon

Cooney Creek, Swan Valley, Condon, Montana, USA Active daytime video of Brook Trout and Westslope Cutthroat Trout swimming in front of the camera, and a Brook trout displaying territorial behaviour towards a Cutthroat Trout

Cooney Creek, Swan Valley, Condon, Montana, USA Active daytime video of a Brook Trout passing very close to the camera several times displaying its colour and pattern nicely, as well as territorial behaviour displayed by an adult Westslope Cutthroat Trout

Cooney Creek, Swan Valley, Condon, Montana, USA A Brook Trout passing by the camera in infrared before daytime video of an adult Westslope Cutthroat Trout with strange healing scars on one side of its body actively passes back and forth several times close to the camera

Cooney Creek, Swan Valley, Condon, Montana, USA Sub-adult Westslope Cutthroat Trout and Brook Trout swimming very close to the camera several times and are chased by a larger adult Cutthroat Trout before an otter briefly swims into view of the camera and upstream out of view later in the video

Cooney Creek, Swan Valley, Condon, Montana, USA Great daytime footage of Westslope Cutthroat Trout and Brook Trout passing back and forth in front of the camera and an adult Westslope Trout with strange injuries displaying territoriality towards rivals

Cooney Creek, Swan Valley, Condon, Montana, USA Active video of sub-adult and adult Westslope Cutthroat Trout and Brook Trout swimming in front of and around the camera, and territorial interactions between both species