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Extremely weird advice on how to identify edible vs. poisonous mushrooms, from a culture that is neither mycophobic nor especially mycophilic, to my knowledge. Interesting article, I do not endorse it. There are no shortcuts to knowing what you are doing.

More beautiful than purple loosestrife, more toxic than a cane toad, an invasive species from the Caribbean all the way up to the coast of Massachusetts (gulp!)

The death cap mushroom. A non-native (to North America) mushroom species with genetically distinct populations in California, New York and New Jersey, Newton Massachusetts (really? so localized) and New Hampshire. Apparently it has a knack for colonizing locations named "new" something.

Identify trees like a birder. From a distance, by color, in springtime.
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Cichlids in the Tropical Forest building.

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Nov. 13th, 2007 07:53 pm
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more and sunsets )
On this day in 365 Urban Species: Horse chestnut.
urbpan: (wading)

Photo by [livejournal.com profile] cottonmanifesto. Location: Ward's Pond, Olmsted Park, Boston.

Urban species #150: Pumpkinseed Lepomis gibbosus

There are several reasons that the pumpkinseed, a member of the freshwater sunfish family, is well suited to urban bodies of water. They are small, and breed prolifically: each female lays around 1500 eggs. The are predators of the most abundant prey animals: insect larvae, snails, worms. And perhaps most importantly, they are tolerant of low oxygen levels in water, a condition caused by the feeding behavior of carp and Canada geese. Pumkinseed males clear a nest near the shore by digging a bowl in the soil with their fins and removing rocks with their mouths. The female abandons the nest after laying the eggs, and the male guards it. When the fry are born, the males continue to aggressively defend them, and even catch them with their mouths to return them to the nest if they wander too far.

Pumpkinseeds are fed upon by herons, mergansers, and cormorants, as well by larger fish, and snapping turtles. Humans prey upon them as well, for sport and occasionally for food.

As a boy I infrequently fished, and caught almost exclusively pumpkinseeds. Catching them is not nearly as challenging as removing them from the hook, as they can erect their dorsal spines in defense. The pumpkinseed can be distinguished from their close relative the bluegill (also an inhabitant of urban waters) by the red spot on its gill cover. My hopefully humorous essay on my ambivalent feelings toward fishing can be read here.
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Urban species #130: Common carp Cyprinus carpio


Photos by [livejournal.com profile] cottonmanifesto

The common carp is a well-known, fairly large Eurasian fish that tolerates poor water quality, feeds on organic material in mud, and reproduces prolifically. It seems like a natural choice for artificial introduction, to provide a sustainable food source in an urban environment. Unfortunately, in the United States, the sport of carp-fishing is not popular, and the meat of this fish is not much sought after. Those few who do fish for urban carp are warned that these animals may have high levels of carcinogenic pcbs in their tissues. In the absence of human predation, urban waterways have become havens for common carp. Their bottom-feeding habits stir sediments into the water, making their habitat unsuitable for other fish that require cleaner water, or higher oxygen levels.

In some urban areas, such as Boston's Jamaica Pond, there are introduced Japanese Koi, which are common carp that have been bred in captivity for their bright orange and white colors. A 20 pound koi was caught there in 2005. Goldfish are carp relatives, and the same hobby of captive breeding produced the baffling variety of goldfish as well as koi.

Mature common carp are so large that they have no urban predators. The largest carp recorded have been over three feet and over eighty pounds. They can be fascinating to watch from urban bridges as they glide below the surface, or burst out of it, displaying their spawning behavior.

More carp! )
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My usual effusive natural history information may be lacking in this post, because when I took these pictures, I was in a dark place crowded with children, trying to keep track of my father (who is a great man, but also half blind and half deaf), my brother ([livejournal.com profile] brush_rat), his two small children, and my step-daughter. I didn't read the exhibit interpretation too closely.

Read more... )


14 pictures )

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