An online resource based on the award-winning nature guide

August

Young Wolf Spiders Dispersing

8-10-18 wolf spider 076Earlier in the summer, you may have glimpsed a spider carrying its white egg sac around with it, clasping it with the spinnerets at the end of its abdomen.  When the spiderlings hatch they crawl up their mother’s legs onto her abdomen, latch onto special knob-shaped hairs, and ride around with her for several weeks (see inset).  Only wolf spiders carry their egg sacs and offspring in this manner.

After molting, which occurs mid-summer, the young spiders disperse.  Eventually the mother is free to hunt for prey without the encumbrance of hitch-hiking offspring.  If you look closely at the pictured wolf spider, you may be able to make out the last lingering spiderling located at the junction of the wolf spider’s cephalothorax and abdomen.

Naturally Curious is supported by donations. If you choose to contribute, you may go to https://naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.

Advertisements

Hard-boiled Eggs & Lollipops: American Caesar’s Mushrooms Forming Fruiting Bodies

8-8-18 American Caesar's mushroom_U1A5159

This is not the first Naturally Curious post on American Caesar’s Mushrooms, nor will it probably be the last.  Every August the forest floor is bursting with the beautiful fruiting bodies of these fungi, and I find the urge to photograph them as well as the desire to celebrate their beauty with you irresistible. Pardon the repetition.

American Caesar’s Mushroom (Amanita jacksonii), a member of the Amanita genus found in New England, differs from most Amanita species in at least two ways. It is one of the few edible Amanitas (most species are poisonous, so consumption is discouraged unless an expert identifies the fungus). Secondly, unlike many other Amanita species, American Caesar’s Mushroom does not usually have any warts or patches on its cap.

The common name of this mushroom traces back to the fact that its close relative, Caesar’s Mushroom, Amanita caesarea, which grows in Italy, was a favorite of the emperors of the Roman Empire, the Caesars. Both of these species of Amanita are mycorrhizal, forming a symbiotic beneficial relationship with the roots of certain trees. Look for American Caesar’s Mushrooms under pine and oak. (Main photo: American Caesar’s Mushroom rupturing through its protective white membrane, or universal veil, as it matures, leaving a remnant white cup, or volva, at its base.)

Naturally Curious is supported by donations. If you choose to contribute, you may go to http://www.naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.


American Kestrel Chicks Fledging

 

8-8-18 A. kestrel_U1A3940

The American Kestrel is the smallest, most numerous, and most widespread North American falcon. Roughly two months ago these birds (formerly known as Sparrow Hawks) were mating and laying eggs in nesting cavities (natural tree cavities, woodpecker holes, nest boxes), most of which are located near open fields with low growth (to facilitate finding insects to eat).  The female kestrel does most of the incubating of her four to five eggs (one month), and all of the brooding (one month).  The male rises to the occasion and feeds the newly-hatched chicks for the first 7-10 days, and then the pair shares the feeding.

After 26 – 28 days in the nest, American Kestrel chicks are ready to fledge.  Their first flight, consisting of alternate fluttering and gliding, can be quite short or as long as 200 yards, and typically ends with an awkward landing.  After the chicks have fledged, the parents continue to feed them for up to 12 days. During this period young American Kestrels have been observed returning to their nest cavity to roost.

(Photo:  Male American Kestrel nestling, roughly 22 days old. Note feathered “eye” spots on back of head (serve to ward off predators) are already showing. Thanks to Joan Waltermire, John Douglas, David Merker, and Sebastion and Carter Lousada for photo op.)

Naturally Curious is supported by donations. If you choose to contribute, you may go to https://naturallycuriouswithmaryholland.wordpress.com  and click on the yellow “donate” button.


Robber Flies Active

8-3-18 robber fly with butterfly2_U1A3399

You may well have seen a robber fly (also known as an assassin fly) and not recognized it as such.  Big eyes, pointed mouthparts, a hairy face and a fondness for insects are robber fly characteristics to look for.

Robber flies are among our largest flies and are predatorial ambushers.  They tend to perch for minutes at a time on the tips of leaves, or other sunny viewpoints, where they keep a lookout for unsuspecting prey.  Once they spot an insect they lose no time in darting after it.  With their beak-like mouthparts they spear the insect and inject a mixture of nerve poisons and enzymes that liquefy the tissues of their victim.  They then drink the innards of their prey.

Note that there is a prominent “beard” or tuft of bristles (mystax) in the front of the pictured robber fly’s face.  All robber flies have this tuft which serves to protect the face and eyes of the predator from the struggling prey as it dines.

Naturally Curious is supported by donations. If you choose to contribute, you may go to https://naturallycuriouswithmaryholland.wordpress.com  and click on the yellow “donate” button.


Shorebird Migration Well Underway

7-30-18 greater yellowlegs 286Contrary to what it’s called, the “fall” migration of shorebirds has been underway since early July, and is in full swing, peaking in August. Vermont is home to only a few breeding shorebirds (Killdeer, Spotted Sandpiper, Upland Sandpiper, Wilson’s Snipe, American Woodcock).  Most of the shorebirds we see this time of year are those migrating south after nesting in the Arctic.

Shorebirds move south relatively early compared to many migratory birds, in part, because the breeding season in the Arctic is quite short. In addition, those birds whose first nesting attempt failed tend to migrate soon afterwards rather than attempt a second nesting, due, once again, to the brief Arctic summer. Also, in several species one member of a pair often leaves before the young are full grown, sometimes even before the eggs hatch, leaving the remaining adult to raise the young.

The young of most shorebirds migrate later than the adults.  There can be as much as a month between the peak passage of adults and that of juvenile birds. (Photo:  Greater Yellowlegs)

Naturally Curious is supported by donations. If you choose to contribute, you may go to https://naturallycuriouswithmaryholland.wordpress.com and click on the yellow “donate” button.


Painted Turtles Hatching

8-29-17 young painted turtle2 049A3648

Painted Turtle eggs hatch in late August or early September. The young turtles remain in their nest for varying amounts of time, often emerging soon after hatching but  frequently not until the following spring in the northern part of their range. Once hatched and out of the nest, they head to ponds and rivers. Because they’re so small (roughly the size of a quarter) they are vulnerable to a wide variety of predators, including frogs, snakes, birds and fish.

 

 


Cortinarius Species Fruiting

8-30-17 purple mushroom 049A3512

This slimy, purple mushroom belongs to the genus Cortinarius, the largest genus of mushrooms in the world. Mushrooms in this genus have partial veils, or cortinas – tissue that covers and protects the spore-producing gills, and they also have a rusty brown spore print and mature gills.

While it is relatively simple to determine that a mushroom is in this genus, identifying one down to species can be difficult. Two identical-looking species, C. iodes and C. iodeoides, can be found in the Northeast – both are purple and have slimy caps. Mycologists distinguish them by the size of their spores. For those more daring than I, there is a licking/taste test — the slime on C. iodeoides is said to be more bitter tasting than that of C. iodes.

Both species are mycorrhizal with oaks, in that both benefit from an association with each other. The mushroom helps the tree absorb water and nutrients while the tree provides sugars and amino acids to the mushroom. It is estimated that about 85% of plants depend on mycorrhizal relationships with fungi.