River otters (Lontra canadensis) have been observed by CSP members in Crystal Springs Creek numerous times in the past, both in the upper reaches at Reed Canyon and also on the property of Westmoreland's Union Manor. At times they seem to maintain dens, usually in the stream bank under trees or stumps, but they are not apparently permanent occupants of any one location, and seem to be highly mobile as individuals and as family groups.
They seem to be spotted most often in the early morning hours or in the evening twilight, and a full-daylight observation is probably quite rare. Recently, sometime during the week of November 2nd, one of our members (Bob Federoff) spotted a pair feeding in the creek at Westmoreland Park and managed to get two excellent videos and a photograph (below). It isn't clear what they are feeding on, it could be fish, crayfish, or freshwater mussels. As Bob said, whatever it was it was something that "required a lot of chewing". CSP member Zac Perry reports that a family of four otters have been seen in Reed Canyon recently as well.