Fat little trout

Our pudgy buddy here illustrates the benefits of being an opportunistic feeder. As wise fishermen know, trout often aggressively pursue whatever prey is readily available at the Read More…

Wild trout water

As you may know from our recent posts (Summer Surveys and Alpine Snorkeling), we regularly conduct trout surveys on streams in the western U.S. Snorkel surveys are Read More…

Trout food?

Potentially. This caterpillar (Arctia caja) resembles a woolly bugger, an artificial fly that is widely used by trout anglers because it resembles many of the edible insects Read More…

Caudal fin pink

This rainbow trout (Oncorhynchus mykiss) is donning a pink mark on its caudal fin not because it is the "in" color for spring fashion aficionados, but because Read More…

Winter trout spawning

We captured this "ripe" female rainbow trout (Oncorhynchus mykiss) while electrofishing in a California reservoir. You can tell if a female is ready to spawn by how Read More…

Rosy cheeks

This fish exhibits conspicuous rosy cheeks characteristic of adult rainbow trout (Oncorhynchus mykiss); but color like beauty, is in the eye of the beholder. Rainbow trout have Read More…

Isolation has its advantages

During a recent visit to Iceland we were amazed by the limited number of freshwater fish species present on the island (7 species). There are only five Read More…

Measure me

After species identification, length is the first and most important biological factor evaluated, and for steelhead trout (Oncorhynchus mykiss) typically recorded as fork and total length (65 Read More…

Young-of-year rainbow trout

This juvenile rainbow trout (Oncorhynchus mykiss) was recently captured in a Central Valley tributary. At 3 inches, it is similar in size to many young trout typically Read More…

One born every minute…

On this day we caught hundreds of juvenile Sacramento suckers (Catostomus occidentalis) and a lone trout. These juveniles are only a few months old, but they grow Read More…