Egg patterns are productive year round. While trout spawn in autumn through very early spring (mostly autumn), suckers and carp are March and April spawners, as are white perch. Yellow perch are February spawners. Bass and various sunnies spawn in May. And catfish in the heat of summer.
At least that’s the general way it shakes out in the mid Atlantic.
Trout populations overlap with all these other fish, to some degree, and fish eggs are fish eggs when you are looking for something to eat.
While there may not be fish eggs in every trout stream, they are a high calorie, low effort food that can show up at any time, so a trout is often fooled by a salmon egg fly pattern in august, May or any other time of year.
The big advantage we have is the trout are not checking the in-season calendar at the grocery store.
Egg patterns: a worthy addition to your fly box for year round fishing.