NATURE NEWS 'Dead crabs' on beach are often just old exoskeletons Rock crab exuvia Seapoint Beach Kittery Pt ME When my kids were little, one of their favorite things to do at the beach was to go crabbing - nothing official, no crab pots or bait, just their hands turning over rocks. As they got older they graduated to string with a hot dog off the dock. They’d always let the crabs go. They went crabbing because crabs are cool little animals, are fun to "race" and are a little scary to handle. My kids learned early on the right way to pick them up to avoid getting pinched. The crab-related question I get most often is about all those dead crabs that wash up on the beach, their little bodies tangled in the wrack-line. The amazing answer to that question (at least to me) is that more often than not those aren’t dead crabs but rather their shed exoskeletons. Crabs belong to a group of invertebrates (arthropods) that have rigid exoskeletons, which provide...
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Dogwhelks (Nucella lapillus)
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NATURE NEWS Dogwhelks are worth getting to know An aggregation of dogwhelks and their egg capsules which look like little yellow grains of rice, that they attach to the undersides of rocks in the intertidal. Found under some knotted wrack at Seapoint Beach ME Photo by Sue Pike By Sue Pike One of my favorite books to reference while exploring the New England coast is Deborah Coulombe’s “Seaside Naturalist.” It covers almost anything you are likely to encounter along the coast and is accompanied by great illustrations that help with identifying and understanding the nature of the organism in question. After an afternoon tide pooling on a recent beautiful sunny hot day I was idly leafing through her book, reading about some of the species I had encountered. What caught my eye was an exception to my usual unconditional love of her descriptions. I had lifted up some knotted wrack (that slippery, spaghetti-like seaweed that coats mid-intertidal rocks and is actually fun ...
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NATURE NEWS Three kinds of periwinkles live in Gulf of Maine Photo by Sue Pike The common periwinkle is considered an invasive non-native species in the Gulf of Maine. A rough periwinkle is at the bottom, smooth periwinkle in the middle and the relatively huge common periwinkle in back By Sue Pike yorkweekly@seacoastonline.com Posted Jul. 19, 2016 at 5:02 PM There is one local snail that I would bet everyone who lives in coastal New England knows and loves: the common periwinkle. What young person hasn’t picked up a periwinkle from the beach and tried to hum it out of its shell? Who doesn’t think that these are cute snails? If you have been to a local beach and your eyes were open, you undoubtedly saw at least one periwinkle — given how many there are out there they are hard to miss. What most people don’t know is that there are three snails that live in the intertidal zone in the Gulf of Maine that go by the name "periwinkle." The one most of...
Black Swallowtail update-eggs hatched!
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Nature News Black swallowtail eggs hatched! Young caterpillars-early instars- feeding on fennel. I don't get how such a tiny egg produced such a large caterpillar-8 mm-in such a short time. (photo of egg in previous blog) That white stripe is due to uric acid deposits that are thought to protect the caterpillars from a toxic chemical (furocoumarin) found in their diet. Members of the Umbelliferae family, like fennel, dill and carrots, all of which are host plants for black swallowtail caterpillars, produce furocoumarins as a defense against micro-organisms.
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Photo by Sue Pike A black swallowtail caterpillar with extended osmeterium — a bright orange defensive organ that releases foul-smelling chemicals to deter predators. Nature News Baby black swallowtail butterflies are beautiful and common by Sue Pike July 14 2016 We have a large patch of bronze fennel growing out back — this is unfortunate because it can be an aggressive invasive plant and is currently attempting to overrun my blueberry patch, but, on the other hand is good because it is home to a host of baby black swallowtail butterflies. These are one of our most common butterflies - adults are a gorgeous large black butterfly with two rows of yellow spots along the margins of the wings, and characteristic drooping “swallow” tails on the hindwings. Black swallowtail egg photo by Sue Pike The fully grown caterpillars are just as attractive with colorful alternating stripes of greenish-white and black with six ye...