10/29/2014
Memoir
A Meal for a Great Blue Heron
by JWTrout (USA)
Picture
Great blue heron
For many years the Delaware River watershed has been the home of wild brown and rainbow trout. On the east coast, you can catch (and, hopefully, release) a wild brown or rainbow trout in the 20 to 25 inch plus range. But, along with the many fly fishers of varying levels of ability come the predators.
“Predators?’’ you might ask.
That’s right, predators.
“Like what?”
When you spend time on the river during periods of trout population expansion, you see the predators showing up. Where were the bald eagles, ospreys, blue heron and otters before that? If the food is there those creatures will appear, sooner or later. It is not unusual to spot a bald eagle every day; blue herons have always been creatures of the river, but more so now. The osprey and the otter are also more present now than in the past. So, predation is a common, routine event during that particular time.
The great blue heron loves trout of any size. You can see their predation efforts in trout sporting beak spear marks or wounds in their backs. Some trout will be bent in a sideways position because of a spear wound from a Big Blue. It is great to see a bald eagle, osprey or otter while on the river. But watch out for Big Blue – that bird is always up to eating another trout.
Big Blue’s diet is normally small fish. However, it can differ depending on the geographic location they live in. They can feed on a wide range of creatures: shrimp, crabs, aquatic insects, rodents and other small mammals, amphibians, reptiles and small birds. Whatever is in abundance becomes their staple.
People might tell you they have a fish pond on their property. But their next statement will be, the blue herons have cleaned out the pond – eaten all the fish, or most of them. You will see netting over the raceways at trout hatcheries – Big Blue has been there and eaten up many of the trout. So, Big Blue is an interesting bird, but also an efficient predator.
I was guiding Charlie on the West Branch of the river a few years ago. We were having a fine day there – it was “bug week,” the first week of June.
As we floated into the Upper Game Lands Pool, I spotted a Big Blue on the southern shore line, but up on the grassy bank, about 20 feet away from the river – which seemed a little odd.
As we moved closer, Big Blue aroused my interest. He kept looking down in the grass. Other than that, there was not much other activity from him and we were also scanning the river for rising trout. A nice Hendrickson hatch was in progress and providing enough food for the trout to surface feed. We spotted a few fish rises below us, so I moved the drift boat into position for a reasonable casting distance. I dropped anchor. Charlie started to work the rising trout. I was observing Big Blue.
A big “wow” escaped my mouth.
“What did you see? Another rising trout?”
“No, Charles, you need to see what this heron is trying to eat.”
So, Charlie stopped fishing and both of us watched. Big Blue stood up straight and kept looking down into the tall grass. The bird was taking its time.
“What is the bird doing?” Charlie asked.
“Just watch, you won’t believe it.”
After a few minutes, Big Blue dropped his head down and lifted up a brown trout of over 20 inches in length. The trout was dead, and hung out on each side of Big Blue’s beak. Not only did Big Blue lift up the brown trout in its beak, he tried to swallow it. The bird kept moving its head and shifting the position of the trout so that it could swallow it head first. Both Charlie and I gasped at the sight. We could not believe that the heron was trying to eat a trout of that size. The trout fell out of the heron’s beak and into the weeds on the bank. Big Blue began repeating the process of trying to swallow that trout, but we had fishing to do.
I pulled up anchor and drifted downstream to another pod of feeding trout. I looked back once and the bird had the trout in its beak and was again trying to maneuver it into a position to swallow it whole.
There goes another trophy trout due to predation by a blue heron, I thought. We hoped that the blue heron would swallow the trout because we were sure he would choke to death on it.