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Jack Schultz

@jcschultz.bsky.social
275 followers 139 following 388 posts

Plant biologist, entomologist, chemical/molecular ecologist, current interest focused on plant galls. Mostly-retired guitarist

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Jack Schultz @jcschultz.bsky.social · 21/11/2025
I know next to nothing about spiders, but this web caught my attention. Does anyone recognize it? Same Houston Forest, Texas.
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Jack Schultz @jcschultz.bsky.social · 07/11/2025
t's raining galls! Galls of the mealy gall wasp are falling out of the southern live oaks all over Houston. As you can see, a lot of them are damaged, as though something tried to eat the larva in the center chamber.
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Jack Schultz @jcschultz.bsky.social · 29/07/2025
Phasmidae - stick insects -often produce highly-figure eggs that appear to have erils. They don't have erells, but some experts think that some phasmid eggs may escape predators this way. Eggs are widely scattered, perhaps to evade predators.
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Jack Schultz @jcschultz.bsky.social · 18/07/2025
My most recent cost $5,500USD. cdn.bsky.app/img/feed_ful...
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Jack Schultz @jcschultz.bsky.social · 10/06/2025
🌿Giant Gladiator Tree Frog, seen along Ucaya River, Peru a couple of years ago. These guys emit a loud human-like scream when disturbed.
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Jack Schultz @jcschultz.bsky.social · 26/05/2025
Antheraea polyphemus moth larva, Hubbard Brook Experimental Forest, NH, USA. Do you suppose it nicked the petiole to cut off translocated defenses?
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Jack Schultz @jcschultz.bsky.social · 24/05/2025
Eryngium prob. alpinum. 🌾🌿
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Jack Schultz @jcschultz.bsky.social · 09/05/2025
🌿An inquisitive black-bellied whistling duck. These are all over Hermann Park in central Houston.
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Jack Schultz @jcschultz.bsky.social · 04/05/2025
Here's C. unicornis, in NH USA.
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Jack Schultz @jcschultz.bsky.social · 01/05/2025
Convergent #evolution. On the left is the creosote bush walking stick, Diapheromera covilleae, on creosote bush in Arizona. On the right is Astroma riojanum on creosote bush in Argentina. They are in different families, pretty unrelated.
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Jack Schultz @jcschultz.bsky.social · 23/04/2025
🌿🧪🌾🌎
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Jack Schultz @jcschultz.bsky.social · 22/04/2025
DOGE finally got to NSF.
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Jack Schultz @jcschultz.bsky.social · 19/04/2025
#Galls on Mustang #grape in Houston, TX, formed by Heliozela sp., I THINK. That a #moth! 🌿🧪🌾
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Jack Schultz @jcschultz.bsky.social · 19/04/2025
More dangerous idiocy. 🧪🌾
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Jack Schultz @jcschultz.bsky.social · 17/04/2025
Watch out - next they'll be coming for you and me. In today's NYT:
Scott was NIH's leading food researcher.
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Jack Schultz @jcschultz.bsky.social · 15/04/2025
This is enraging. 🌿🧪🎓🌾
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Jack Schultz @jcschultz.bsky.social · 10/04/2025
Some more of the flowering plants I encounter walking around Houston's Medical Center area (along Bray's Bayou)🌿🌾
Erigeron philadelphicusScandix pecten-venerisBignonia capreolata
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Jack Schultz @jcschultz.bsky.social · 10/04/2025
Some more of the flowering plants I encounter walking around Houston's Medical Center area (along Bray's Bayou)
SisyrinchiumVicia crachaRudbeckia amplexicaulisCastilleja indivisa
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Jack Schultz @jcschultz.bsky.social · 10/04/2025
Some of the flowering plants I encounter walking around Houston's Medical Center area (along Bray's Bayou). 🌿🌾
Lysimachia arvensisLupinus texensisOenothera speciosaPyrrhopappus carolinianus
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Jack Schultz @jcschultz.bsky.social · 01/04/2025
"Hey! what about me?" Green Tree Ants (Oecophylla smaragdina) NSW, Australia 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 27/03/2025
#ThrowbackThursday A memento from my time in university administration.
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Jack Schultz @jcschultz.bsky.social · 27/03/2025
I don't know what they were catching, but several fish species live in that bayou. I've mainly seen carp and armored catfish
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Jack Schultz @jcschultz.bsky.social · 26/03/2025
@scottpegan.bsky.social Scott, are these parasitoid emergence holes? #galls #insect #oak
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Jack Schultz @jcschultz.bsky.social · 26/03/2025
A crowd fishing in Brays Bayou, Houston, this evening.
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Jack Schultz @jcschultz.bsky.social · 21/03/2025
Let's start a #FlowerFriday thread. My contribution: Cholla flower, Joshua Tree National Park, CA. 🌿
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Jack Schultz @jcschultz.bsky.social · 20/03/2025
#ThrowbackThursday A hip Christmas gift from my daughters. 2015
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Jack Schultz @jcschultz.bsky.social · 19/03/2025
Here's a Wednesday #humpday leaf-mimic katydid nymph. La Selva Biological Station, Costa Rica 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 13/03/2025
#ThrowbackThursday Big leaf coverup, Costa Rica, 1981.
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Jack Schultz @jcschultz.bsky.social · 11/03/2025
This is a burrowing crayfish chimney. They function as burrow-ventilation structures for burrowing crayfish, species that don't live in open water but occupy subterranean waters.🌿🧪
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Jack Schultz @jcschultz.bsky.social · 11/03/2025
Gelsemium sempervirens, (Yellow Jessamine) a twining vine in the family Gelsemiaceae was blooming all over the Big Thicket, east Texas, last weekend. And the pitcher plant flowers were just unfurling.
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Jack Schultz @jcschultz.bsky.social · 06/03/2025
#ThrowbackThursday With science and life collaborator Heidi Appel at the Wayquecha Biological Station in Peru. www.amazonconservation.org/what-we-do/p... Below is a massive, multi-acre litter throughfall and nutrient cycling experiment. 🧪🌿
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Jack Schultz @jcschultz.bsky.social · 05/03/2025
Here's a caterpillar gut. The long green portion is the foregut, full of freshly-consumed leaf material. The brown section is the midgut, where the leaf material is oxidized, causing the color change. Ph there is around 11.5 🧪🌿
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Jack Schultz @jcschultz.bsky.social · 05/03/2025
Here's a humped caterpillar for Hump Day. Coelodasys unicornis, Unicorn Caterpillar. Hubbard Brook Experimental Forest, NH, USA 🧪🌿
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Jack Schultz @jcschultz.bsky.social · 27/02/2025
#ThrowbackThursday. Hanging with the girls on the Valdez Peninsula, Argentina, 1973
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Jack Schultz @jcschultz.bsky.social · 20/02/2025
#ThrowbackThursday. Fun collecting moths at the blacklight, Hubbard Brook Experimental Forest, 1982. 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 19/02/2025
Expecting a freeze tonight here in Houston, Texas, so the desert garden had to be brought inside.
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Jack Schultz @jcschultz.bsky.social · 19/02/2025
The lumps on this #leaf are #domatia, cavities that house (usually) #mites. The mites prey on harmful mites or clear fungi. Domatia may be induced by the mites or are part of the plant's development. I think these are the latter. Plant species unknown, from Peru.
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Jack Schultz @jcschultz.bsky.social · 17/02/2025
#macromonday Owlfly larva, La Selva Biological Station, Costa Rica. 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 16/02/2025
Evidence of a struggle. Tree responds to vine by engulfing it in 'stress' or 'wound' wood. 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 14/02/2025
One of these is a mimic, the other a model. #caterpillar #crypsis #insect
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Jack Schultz @jcschultz.bsky.social · 13/02/2025
#ThrowbackThursday. Preparing for my altenative career, about 1964. That guitar, which I sold for $350 in 1971, is now worth between $7,000 and $12,000
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Jack Schultz @jcschultz.bsky.social · 13/02/2025
Twig-mimic #geometrid #caterpillar (inchworm). Probably Plagodis alcoolaria. On striped maple. Hubbard Brook Experimental Forest, NH, USA. #moth Notice the silk 'guy line' helping it remain steady. 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 13/02/2025
Lake Michigan at Wilderness State Park, MI
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Jack Schultz @jcschultz.bsky.social · 12/02/2025
It’s #Darwin Day. He was interested in the #galls #insects induce on #plants. He mused that gall development is caused by injected insect chemicals altering the plant’s own signals and that this involves fruit development traits, resulting in galls that resemble fruits. Gall Left, Fruit Right 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 10/02/2025
This #caterpillar sensed the vibrations on the branch caused by the approaching mouse, and dropped out of reach on a silk strand. 🌿🧪 Hubbard Brook Experimental Forest. My photo.
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Jack Schultz @jcschultz.bsky.social · 09/02/2025
THIS is the photo I meant to post. It shows the parasitic flies much better.
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Jack Schultz @jcschultz.bsky.social · 09/02/2025
Walnut Caterpillars (Datana intergerrima) group during the day, scatter to feed at night. This day format helps protect them from parasitic flies trying to lay eggs on them. The caterpillars all wave their heads when they sense a fly. See the tachinid parasites flying below and resting above. 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 08/02/2025
Cerura vinula (moth) caterpillar, exerting filaments that release repellant volatiles. Hubbard Brook Experimental Forest, NH, 1980. 🌿🧪
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Jack Schultz @jcschultz.bsky.social · 03/02/2025
How would you like to be a junior author of a paper in review about pregnancy, given this:🧪
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Jack Schultz @jcschultz.bsky.social · 27/01/2025
#SmallWonders Hermit crab at sundown on a beach in Corcovado National Park, Costa Rica. ...and the photographer
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