Tuesday, February 24, 2015
I have lost track of how many times I have hiked on the dike at Wiley Slough. It provides a trail deep into the wetlands of the Skagit River Delta. The site is managed by the Washington Department of Fish and Wildlife. Despite all those visits, yesterday was the first time I have ever seen an American Coot (Fulica americana).
At first, there was just one. Then a second bird appeared and joined the first one. When the two entered the slough and began to swim, I spotted a third one that joined them from the opposite shore.
American Coots are about the size of a small chicken. They are said to be common and abundant in wetland areas throughout the Puget Sound Basin. The Skagit River Delta would appear to be ideal habitat. It consists of sloughs, marshes and ponds where the Skagit River drains into Puget Sound. Water levels will fluctuate subject to both river flow and tidal action. There is a mixing of fresh and salt water. This is an important rearing habitat for Chinook Salmon fry.
Where I stood on the dike, I was only 8 to 10 meters from the birds. They seemed to be aware of my presence, but did not become overly alarmed. This is unlike the ducks out there that always flee in terror at the sight of people. I remained still as I took pictures and watched them. They quietly moved along a weedy mud island grabbing a snack here and there as they moved. Watching them made me think of Muppets.
The scientific name Fulica is from fulix which is Latin for waterfowl. The word "coot" is derived from Low German. It is similar to the Dutch word coet, (pronounced "coot") which refers to a similar bird.
They have huge and amazing feet. I tried to get a photo of them, but there was too much mud and plants in the way. There are a couple of good photos of their feet at the Washington Nature Mapping site.
Those feet are obviously designed for walking on unstable ground. Their nests consist of floating islands built of marsh plants and hidden inside of cattail beds. Having oversize feet must come in handy for negotiating a floating nest platform.
I watched the trio slowly move up Wiley Slough until they disappeared behind vegetation. I was heading back to the parking lot when I spotted them. Until then, I hadn't seen anything noteworthy. There weren't even any eagles around which is unusual there. This first time sighting of American Coots really made the day for me.
Friday, February 13, 2015
Meet Ensatina eschscholtzii, the Ensatina Salamander. I found this one under a large piece of bark on the North Trail in the Kukutali Preserve. It was about 5 inches/13 cm long and didn't move a muscle when it was exposed. A map showing location is linked at the bottom of this post. I don't believe I have ever seen one of these before making this an important find for me.
Ensatina means "like a sword." Eschscholtzii may refer to Johann Friedrich von Eschscholtz, a nineteenth century physician and naturalist who explored Alaska and California.
Initially, I misidentified this guy as a Northwestern Salamander (Ambystoma gracile). But that species has large parotid glands behind the eyes. My salamander does not. What clinched the ID was the obvious constriction at the base of the tail, unique among Washington salamanders. It is clearly visible in the photo. This little amphibian has some other unusual characteristics:
- They do not have lungs. Instead, they absorb oxygen through their skin.
- They secrete a noxious liquid from their tails to repel their enemies.
- They are described as a "ring species." More on that below.
- Ensatina does not need to return to water to breed. Females can brood their eggs under damp rotted wood or in underground burrows. The young hatch as fully formed miniatures of the adults.
- They can regenerate lost limbs making salamanders unique among vertebrates.
- They are most active at night during fall, winter and spring when it is rainy, cool and damp. That's a lot like the people who live here.
Because they must absorb oxygen through their skin, people should avoid handling them. Oils and chemicals on our hands can disrupt this vital oxygen exchange.
The Wandering Herpetologist provides a good description of a "ring species:"
"A ring species is an organism that exists in a series of connected populations in which the two extreme end populations can no longer interbreed. This is speciation in action, meaning the ensatina salamander is becoming separate species."Apparently, Ensatina Salamanders originated in British Columbia. They gradually spread south through Washington and Oregon and into California. There, they split and spread down the east and west sides of the dry Central Valley. At the end of the valley, the two groups rejoined, but could no longer interbreed. The genetic differences had become too great over time. This is evolution in action. This 3 minute video explains it further:
I have learned a lot about salamanders I didn't know before I found this little guy. I am pleased to share what I learned about this reclusive, unassuming little creature. The Kukutali Preserve is turning out to be one of the best places around here for spotting wildlife.
Tuesday, February 3, 2015
Last Friday, January 30, I was in the Kukutali Preserve. I hiked out to the south beach off Flagstaff Point. Because it is a fragile ecosystem, the point itself is off-limits to visitors, but access to the beach is permitted. I was there to see if the resident Oystercatchers were around, but not on this day. Instead, I encountered a pair of Song Sparrows (Melospiza melodia) exhibiting some odd behavior.
The two birds were positioned about six feet (2 meters) apart. The one on the shore was swelled up with neck tucked in looking rather like Jabba the Hutt ("heh-heh-heh"). He was flipping his wings up, first the left one, then the right.
This was the object of his attention, a second Song Sparrow on the beach perched on driftwood. At first, I thought I was witnessing courtship. Although January seemed a bit early for that, it was a very spring-like morning. This entire winter has been warmer than usual.
When I got home and started to research the behavior, I discovered this was a territorial dispute. Apparently the displaying sparrow considered this his turf and the second bird was trespassing. There was little reaction from this second sparrow except, perhaps, for his crown feathers propped up in Mohawk haircut style.
The actual courtship of Song Sparrows apparently does involve what looks like territorial displaying. The female might be attacked like an intruder in the males territory. Instead of fleeing or fighting back, she sings him a sweet song. Who could resist that?
Song Sparrows are amazingly easy to photograph. They are not particularly shy of humans and tolerate having cameras pointed at them. This pair flew up and landed about 10 feet (3 meters) from me. They performed their little display while I took their picture. When the second bird flew up to Flagstaff, the first one was right on his tail. I went on my way with another interesting wildlife encounter.
Regarding the Oystercatchers, I haven't seem them out there all winter. Because the Preserve is now open, have they been chased away by the increase in visitors? Perhaps they don't spend winters here at their nest site. They may have joined the large gathering that I see at West Beach over in Deception Pass State Park. I hope to see them at Kukutali again when spring comes.