Going to the dredge islands

eagle bones, lichen gardens, and an octopus rescue

On a fine low tide in late April, I headed out to some of the dredge islands in Gastineau channel, along with two friends. Before we even got to the islands, we found several interesting things. In the middle of the dike trail lay the feathers and other remains of a dead bird. Grazing on the innards were at least twenty little brown slugs—officially known as reticulated tail-droppers. We often see them on bear scats filled with digested vegetation, and gardeners make war on them when they attack some treasured plants, but what were they getting from bird guts?

Just as we left the dike trail, our attention was drawn to a pinkish blob lying in sparse grass. A second look told us it was on octopus, stranded by a recent high tide. An octopus has no business being up in the grass, so after determining that it was still alive, we carefully put it in a plastic bag (from which it tried to crawl out, of course) and carried it with us until we reached some permanent salt water, where it was released and slowly crawled away. It may not have been in very good shape by then, and maybe some disability accounted for its being washed up into the grass, but at least it got a second chance.

octopus-escaping-kmh
The octopus tries to escape its rescuers. Photo by  Katherine Hocker

One island of this chain of islands was a real island before the channel silted up; its core is a forested ridge of bedrock, now surrounded by uplifted land that supports a ring of small spruces and elder berry bushes. An exploration of this island turned up two bird skeletons, minus the skulls; a little forensic work later determined that the bones were very likely those of bald eagles. That made us suspect that they had been shot and left to rot. A sorry thing!

Under some of the trees we found burrows that looked like old otter dens, probably made back in the days before post-glacial uplift increased the distance to permanent water. A cast-up pellet of undigested bits, probably from a raven, held—of all things—the better part of the bowl of a plastic spoon. Overhead, a group of eagles and crows circled peaceably.

We flushed several snipe from the sloughs that cross the wetland. A female harrier coursed in and out of the trees on the smaller islands, probably on her way north (although harriers do nest here occasionally). And buttercups were starting to bloom along the edges of the spruce groves.

Best of all were the lichen gardens on the smaller islands, which are made of dredged sediment from the channel. Sometimes called lichen ‘barrens’, these gardens are barren only of trees and shrubs and tall herbs. They can be a wonderfully artistic spread of color and form. The lichens were very happy, owing to recent rains, so we spent some time admiring the natural art show. We also tried very hard to place our feet where they would do the least damage. Each of these gardens of miniatures was surrounded by a ring of young spruces, lending them a feeling of seclusion and privacy.

On the way back to the car, we spotted a little group of five snow geese, busily grazing—the last reward of a profitable excursion.

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