September 10, 2026

Leading a walk on Galbreath Wildlands Preserve - Sept 26th

Hello friends,

Doing a walk on Galbreath Wildlands Preserve for Sonoma State University Center for Environmental Inquiry on Saturday, Sept 26th. Come join me! Parking is limited so a free reservation is required.

Registration and more details at:
https://cei.sonoma.edu/events/micro-safari

Hope to see some of you there :)
Cat

Posted on September 10, 2026 06:47 PM by catchang | 7 comments | Leave a comment

December 19, 2025

The hunt for Boraginaceae: Plagiobothrys glaber, presumed extinct

Plagiobothrys glaber (Gray), presumed extinct, CNPS Rank 1A

An illustrated flora of the Pacific States: Washington, Oregon, and California
Comparison of nutlets from An Illustrated Flora of the Pacific States by Leroy Abrams, Stanford University Press, 1951.

The hunt for Boraginaceae
Herbarium collection from Mt. Eden, Alameda

The hunt for Boraginaceae
Abaxial view of nutlet

The hunt for Boraginaceae
Axial view of nutlet

Jepson:
Habit: Annual, sparse-short-strigose.
Stem: ascending to erect, 1--2 dm, thick, hollow.
Leaf: cauline, lower 2--11 mm. Inflorescence: dense, bracts below; pedicels 0.5--2 mm, thick, hollow.
Flower: calyx 3 mm, 8--10 mm in fruit, narrow, basal 2--3 mm fused into fleshy cylinder, lobes appressed, +- spreading at tip, oblong to spoon-shaped, midveins thick; corolla limb +- 3 mm diam.
Fruit: nutlet 1.8--2 mm, lanceolate to lance-ovate, shiny, dark brown, attached firmly; abaxial ridge narrow, obscure below middle, cross-ribs above middle, few, rounded, wrinkled, +- flat below, +- tubercled; margins with entire border; adaxial ridge V-shaped, fine- to obscure-granular to smooth; scar basal, generally on peg.

Ecology: Wet, saline, +- alkaline soils in valleys, coastal marshes; Elevation: < 100 m.
Flowering Time: Apr--May

Unabridged Note: As noted by C.V. Piper in 1920, Plagiobothrys glaber and succulent forms of Plagiobothrys stipitatus var. micranthus can be distinguished by nutlets (the latter coarse- and conspicuous-granular adaxially, with margin border not entire).

Illustrated Flora of the Pacific States:
Allocarya glabra (A. Gray) J. F. Macbride. Glabrous Allocarya.

Stems erect, with stout erect branches from near the base, 1-2 dm. high, succulent, very sparsely strigillose. Lower leaves linear, 5-8 cm. long, upper ones linear-oblanceolate and shorter, glabrous above, sparsely pustulate and strigose below ; racemes rather densely flowered, erect and somewhat fistulous, leaf-bracted at base, unilateral with the flowers somewhat 2-ranked; corolla about equaling the calyx-lobes, the limb about 1.5 mm. broad; fruiting calyx sessile accrescent, 8-10 mm. long, the lobes united below with a tube about 2 mm. long, becoming firm by the indurated midrib; nutlets lanceolate, 2 mm. long, the body flattened and the apex attenuate and beak-like ; dorsal side with a cauline keel and two rather definite lateral ones, also with a few transverse ridges mostly above the middle, tuberculate; ventral side keeled the whole length, weakly tuberculate; scar basal, circular, substipitate. Salt marshes and alkaline flats, Upper Sonoran Zone; margin of San Francisco Bay in Alameda and Santa Clara Counties, and near Hollister, San Benito County. Type locality: "Apache Pass. S. Arizona, Lemmon, 1881." "Some misplacement of labels is to be suspected, for the form is common in the Alameda marsh lands, particularly about Mount Eden." K. Brandegee

Posted on December 19, 2025 01:31 AM by catchang | 3 comments | Leave a comment

July 22, 2025

Links for unobserved species by me by place

Posted on July 22, 2025 12:47 PM by catchang | 0 comments | Leave a comment

May 15, 2024

INat Happy Hour - Eugene, OR

Hi all,

I’ll be in Eugene this week. Perfect for hosting a iNat Happy Hour this Friday 5/17 from 5:30-7:30 at

Oakshire Brewing Public House
207 Madison Street Eugene, Oregon 97402

Tagging the most recently active users for the Eugene area with at least 100 observations. Please feel free to tag people you think would be interested in the comments.

Looking forward to meeting you all!
Cat

Posted on May 15, 2024 03:36 AM by catchang | 8 comments | Leave a comment

May 3, 2024

Publications and communications

This journal post is to keep track of articles, podcasts, etc. I've participated in.

Articles and podcasts:
• Linksploration - Bay Area iNaturalist - Your nature identification buddy, and so much
• Jumpstart Nature Podcast #5
INaturalist YouTube Channel iNaturalist 2023 Deep Dive Webinar
"The New Naturalists" by Mary Ellen Hannibal, Fall 2019 Bay Nature
"If the Green Stuff in the California Trees Is Not Spanish Moss, What Is It?" by Cat Chang, Ask the Naturalist, Winter 2018 Bay Nature

Publications and websites:

Pyrrocoma benitoana Nesom, G.L. 2025. Taxonomy of the Pyrrocoma racemosa group (Asteraceae: Astereae). Phytoneuron 2025-08: 1–64.
Orphanostigma haemorrhoidalis Cock, M.J.W., Day, M.D., Solis, M.A., and Winston, R.L. (2025) Publicly-shared DNA barcodes and citizen science images provide new evidence on the establishment and spread of a lantana biological control agent, Orphanostigma haemorrhoidalis (Lepidoptera, Crambidae). CABI Agriculture and Bioscience 6(1), 0010, 11 pp.
Sesia tibiale Cover photo for Lepidoptera Novae, ed. Dr. John B. Heppner, 2024 with permission.
Vespula sulphurea used in The Social Wasps of North America, Chris Alice Kratzer with permission. Orders at https://www.owlflyllc.com/product-page/the-social-wasps-of-north-america.
Medetera diadema used in Naturalist Training series for Keep Coyote Creek Beautiful by Barbara Banfield and Eddie Dunbar by permission.
Parnassius behrii used with permission in Yosemite Wildlife by Beth Pratt and Robb Hirsch to be published by Yosemite Conservancy in fall 2025.
Chlosyne whitneyi used with permission in Pollinators of the American West field guide by Denver Botanic Gardens.
Allokermes rattani on Gallformers.org at https://www.gallformers.org/gall/1217
Aglaothorax ovatus in Field Guide to California Insects: Second Edition, Vol. 111, California Natural History Guides by Kip Will, Joyce Gross, Daniel Rubinoff, & Jerry A. Powell. Used with permission.
Argynnis callippe ssp. callippe used in the February 2025 newsletter for Sonoma Land Trust.

Posted on May 3, 2024 07:11 PM by catchang | 1 comment | Leave a comment

December 11, 2023

2023 Year End Wrap

Omiodes

It’s been a minute since I looked back through a year on iNat and thought about the journey through the seasons and all the public lands accessed.
Highlights of the year:

-Joining the iNaturalist Board. I’m excited to help create sustainability for iNat as the organization moves into independence with an amazing group of people. Please join our community of monthly supporters; building diverse means of support is critical.

-Passing my 40,000th observation this spring. I decided to honor it with an excursion to the Griswold Hills in search of Desert Candle, Caulanthus inflatus with a crew of people I am honored to call friends. These are all friends I’ve become close to through the time we spend out in the field. @robberfly, @leslie_flint, @burtosa

-Seeing endemic Lepidoptera including the only two endemic butterflies in Hawai’i. This Omiodes moth is stunning; I found it by running a moth light at the hotel we stayed at in Kealakakua. The Kamehameha Butterfly, Vanessa tameamea is incredibly florescent in flight as it rockets through the canopy of the forest. I was lucky to be able to catch it for the few moments it was stopped on its host. The Hawaiian Blue, Udara blackburni isn’t blue but a beautiful shade of green outlined in yellows and rusts.

Posted on December 11, 2023 11:32 PM by catchang | 2 comments | Leave a comment

September 12, 2023

December 28, 2020

2020 Year End Wrap

I don’t need to say this- but 2020 was a year for the history books. I did my best to follow Shelter-in-Place guidelines for my county. At first I tried staying close to home- but being in Oakland open spaces with hundreds of other inner Bay Area people on a trail felt less safe than driving to the next county over. I posited my actions were reducing pressure on our local parks where much of Oakland’s populace has little privilege to get further out. Perhaps my internal justification is self serving— but access to natural open spaces can be very difficult for many city dwellers.

This year’s highlights were modest:

-Local Butterfly Counts:
My favorite was the Berkeley count. Meeting up with @robberfly, @tiwane, Danielle, @kueda reminded me why it’s a privilege to be out in a beautiful day counting urban butterflies. I forget how many species we had, but we saw a number of Euchloe ausonides, Large Marbles (and a Lycaena gorgon, Gorgon Copper!).
Euchloe ausonides Large Marble
I helped with the SF, Mt. Diablo, Benicia and Pt. Reyes counts this year as well.

-Quercus palmeri:
Been wanting to see this species and tracked one almost in my backyard. Well- it was in the inner Bay Area and in my county! Still want to see the acorn cap for this. It makes a little hat that flares out amazingly. I am amazed by the potential bio-diversity in our urban areas.

-Staying safe and surviving:
I have missed all the people who I usually hike with. But here's to getting through this together.


2020 year end comparison

(Click on photo if you want to be able to read the text.)

The iNat team graciously created a Year in Review tool. It got me thinking about the 5 years that I’ve been using iNat to understand what’s around me. I started in 2016 as a way to learn my fungi and along the way, that interest shifted to lichens and then to moths. Here is my comparison of use. You can see how my interest in moths has grown (and how 2020 really was an outlier since travel was suppressed.) @robberfly was a huge part of helping me learn this area of biology. Thanks, buddy- I’m sure in 2021 or 2022 we will be able to get out and about more easily.

Posted on December 28, 2020 08:24 PM by catchang | 9 comments | Leave a comment

August 23, 2019

August 14, 2019

Larval Case Architecture and Implications of Host-Plant Associations for North American Coleophora

Larval Case Architecture and Implications of Host-Plant Associations for North American Coleophora (Lepidoptera; Coleophoridae) by Sibyl Bucheli, Jean-Franc ̧ois Landry, and John Wenzel

https://pdfs.semanticscholar.org/b3bd/1e169460323dfe13074f803190c6fab89833.pdf

Posted on August 14, 2019 05:01 AM by catchang | 0 comments | Leave a comment