I knew Jack, not well but friendly. We both tied for years at the Fly Fishing shows in the North East. His patterns and views on fishing were surely out in front. I don't believe I've seen a commercially or otherwise produced gurgler tied Jack's way in a very long time. His patterns were super simple. Sparse bucktail, some flash, foam and a palmered hackle body. That's the starting point for the thousands of variations that are out there. Amazingly most every variation will take fish because the foundation of the pattern is solid.
I have always been a tinkerer with existing patterns and have had great success over the years with improving patterns. I think that most of my tinkering has to do with thousands of hours on the water observing fish. My thoughts on the evolution of the gurgler. I think that the original created a great illusion of a baitfish or small group of baitfish being pushed to the surface. The streamlined design and ability to push and create sound really mimics this scenario well and the fish have stamped their approval. Fish will be taken on Jacks version forever!
Throughout the evolution the other scenario that seems to play out often in the predator vs. prey relationship is the damaged, wounded fish that lays sideways on the surface. Whenever huge schools of bait are congregated near the surface there are always fish laying on their sides slapping the water. Very common with Bunker aka. Menhaden. All of us who spend time on the water have seen this. I think that a lot of the Gurgler variations out there do a decent job of imitating this other ringing of the dinner bell, sideways silhouette.
It is my opinion that the 2 scenario theory that the original and the more modern variations cover is further proven by the fact that fish will take the original with fairly quick steady retrieves while the other more widely tied versions excels with short burst of action followed by pauses. Neither is as successful when the fishing technique is reversed.
Both styles have their place in the fly box since both mimic and sell the illusion of vulnerability and trigger the predatory strike in different ways.
Here are some variation that I tied for one of my clients. I believe these particular patterns imitate when bunker or other baitfish roll on their sides and slap at the surface. These work really well for Striped Bass up north. I have also had good success with these on various species in Florida. My #1 fly when big Jacks are about.
Included top and bottom view