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I stood with another naturalist (actually a bona fide scientist who I admire and feel honored to hang out with sometimes) waiting for a third to arrive, when we noticed this wasp. Neither of us felt threatened, as she was extremely busy digging about in the sand. The sand was left over from the winter road treatment, and so was shallow and not very hard packed--not great for the wasp's purposes. She dug in one area and then another, occasionally picking up a pebble larger than her head with her mandibles and placing it away from her work zone. She was trying to find a place to dig a burrow in which to lay her eggs. Once she found one (she'll have better luck over at the baseball infields across the street) she'd then go find caterpillars and sawfly larvae (which humans often mistake for caterpillars, so I guess, close enough?) sting them to paralyze them, and stuff them down the hole with her eggs.

This genus of moth is Ammophila which means "sand-lover," and the silvery dashes on the thorax indicate that this is probably A. procera.

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Identifying animals from plants

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The plant is a black cherry Prunus serotina, a weedy little tree found throughout the New World. The leaf bears the mushroom-like galls of a tiny arachnid, the mite Eriophyes cerasicrumena. The animals are living inside the protuberance.

The white discoloration patterns on the leaf are feeding marks left by leafhoppers--small (but enormous compared to the mites) insects that puncture the leaf and feed on the fluid within.

Thanks always to Charley Eiseman, who expertly divines animals from the marks they make on plants. He rears galls to identify the adult insects--I think he has discovered new or locally unknown species doing this.

280 days of Urbpandemonium #228

The last two in the project were flies pretending to be wasps. Hard for this one to pretend to be anything but what it is--the largest wasp in the northeast, or at least the longest. That thread protruding from her abdomen is her ovipositor, and it brings her length to about four inches. This is the giant ichneumon Megarhyssa macrurus. She'll stab that thing into a rotting stump right into the body of a pigeon horntail larva and deposit her egg. Her baby then feeds on the horntail baby and, as they say, the beautiful cycle of life continues.

Despite her warning coloration and her terrifying (to many people) appearance, the giant ichneumon is not at all harmful to humans.

Common whitetail

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This guy lives up to the name--it's the most frequently seen dragonfly in the yard. This is a male, with his bluish white abdomen; females are the same shape but have brown "tails" marked with light diagonal dashes. (As seen here.) All dragonflies are predators that catch other insects in flight, including biting flies. You should always be happy to have dragonflies around.

280 days of Urbpandemonium #227

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Looking like a wasp is an adaptation assumed by many different species of flies. Looking like a really huge wasp is more rare, but this Mydas fly Mydas clavatus has it down. It has a wasplike flight and measures a full inch in length, making it one of the largest true flies around. Its larvae feed on beetle grubs in the soil, and adults visit flowers for nectar. It may look scary but its one of the most beneficial insects in the yard.

280 days of Urbpandemonium #226

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When I saw this animal I wasn't sure if I was seeing a wasp or a fly or some other kind of insect. The illusion is intentional--well, maybe not--the illusion has resulted from evolution. This fly resembles a wasp because it helps it survive. The illusion extends to the fly's front legs, which are marked with white segments, and moved in a way to suggest that they are the wasp's antennae. This is the entirely harmless stilt-legged fly Rainieria antennaepes.

Tiny life on the nasturtiums

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Until the drought killed them, our nasturtiums were a food source for many. This bejeweled true bug (hemiptera) is unidentifiable, but was probably drinking plant juice.

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Likewise these candy-stripe leafhoppers were using their beak-like mouthparts to jab holes in the plant and sip its fluid.

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And then underneath the leaves these black aphids were also settled in to drink.

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Enter the cavalry: ladybeetle larvae specialize on soft-bodied plant-feeders like aphids.

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Off they go to eat some aphids--ultimately the plant succumbed to the combined stress of drought and bugs, but it was fun to record the events.

Dry white life in the woods

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Without a daily blog project I've been letting photos build up a long time: these are from a walk we went on in the Stony Brook Reservation on July 8th. This is one of the only mushrooms I've seen all summer.

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Not far away, feeding on the sugars shared between tree and fungus, are a group of ghost flowers, or monotrope.

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These parasites need no chlorophyll, so dot the forest with ghostly white instead of green.

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A distant relative in the same family, striped Pipsissewa is found from Canada to Panama, but is endangered across some of its range.

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The plant is sometimes called striped wintergreen, or more confusingly, spotted wintergreen. Some government agencies have taken to calling it "striped Prince's Pine" in the misguided idea that this is somehow less confusing.

A blog you should know:

If you haven't taken a look at Why Animals Do The Thing you should.

"We're here to yell at the bad stuff, explain the confusing bits, and pull out the cutest, coolest, most unknown content - all while putting animal behavior in its own proper context. "

This blog (mostly written by a friend of mine, full disclosure) is an exhaustively researched collection of articles, debunkings, and answered questions. I started showing it to everyone I know when it featured the best description and explanation of the Harambe debacle at Cincinnati Zoo.

There's a lot of debunking of Animal Rights Activism, explanations of pet animal behavior, and answers to questions like "why do lactating elephants appear to have human breasts?"
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Our June Urban Nature Walk was at Savin Hill Beach in Dorchester. This sun-bleached European green crab shell on dry seagrass is a good symbol of how hot and dry it's been.

more than 4 pics means use a cutCollapse )


The Urban Pantheist

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August 2016



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