Mesoxaea texana Archives - El Mesteño® Ranch and Arboretum

2025 was a Banner Year for our Mesoxaea texana on the South Texas Sand Sheet in Puerto Rico, Texas!

Camille — Sun, 05 Jul 2026 17:31:29 +0000

by C. M. Smith Rich

**The Mesoxaea texana were out for two observed, documented emergence cycles in 2025 on the South Texas Sand Sheet**:

First Cycle: May 17, 2025 – June 20, 2025
Second Cycle: September 6, 2025 – October 1, 2025

**Observed, documented associated taxa for our Mesoxaea texana from 2021 – 2026:**

Waltheria indica / Hierba Del Soldado
Salvia ballotiflora / Shrubby Blue Sage
Eysenhardtia texana / Texas Kidneywood
Aloysia gratissima / White Brush / Common Bee Brush
Citharexylum berlandieri / Berlandier’s Fiddlewood
Cynanchum barbigerum / Thicket Threadvine / Aphid Vine
Funastrum cynanchoides / Climbing Milkweed
Chloroleucon ebano / Texas Ebony
Caesalpinia mexicana / Mexican Ceasalpinia
Clematis drummondii / Old Man’s Beard / Barbas De Chivato
Lippia graveolens / Mexian Oregano / Redbrush Lippia
Florestina tripteris / Three Lobed Florestina

Saliva ballotiflora

Eysenhardtia texana

Waltheria indica

Mesoxaea texana behaviors observed/documented from 2021 – 2026:

Territorial Patrol
- Hovering
- Challenging
- Zooming
Territorial Aggression
- Combat Behaviors Observed:
  - Head-butting aka “Booping”
  - Dive-Bombing / Shoving
  - Grappling / Wresting, aka “Bee-Nado”
Foraging
Grooming
Copulation

Female Mesoxaea texana appears to be grooming on this gusty day:

Female Mesoxaea texana hanging on to Waltheria indica.

Female Mesoxaea texana appears to be impaled on Prickly Pear spines just after the male Mesoxaea texana that was mating with her flew away.

**One of our male Mesoxaea texana fell prey to a stealthy Lynx spider:**

Male Mesoxaea texana found in a deadly Lynx spider embrace.

**A male Mesoxaea texana, aka our “El Guapo,” under a microscope:**

Male Mesoxaea texana under a microscope.

Micrographs of our male Mesoxaea texana:

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“El Guapo”

Male Mesoxaea texana

**Stay tuned for preliminary 2026 data for the Mesoxaea texana‘s emergence cycle that was observed and documented as of April 21, 2026–and which is still currently on-going as of July 7, 2026!!!!**

Thank you for your visit!!!!

**P.S. I am still searching for a Mesoxaea texana nest site!!!!**

The post 2025 was a Banner Year for our Mesoxaea texana on the South Texas Sand Sheet in Puerto Rico, Texas! appeared first on El Mesteño® Ranch and Arboretum.

“El Guapo,” our rare Mesoxaea texana, catching some Z’s on the South Texas Sand Sheet!

Camille — Wed, 13 May 2026 00:00:14 +0000

By C. M. Smith Rich

As of approximately April 21, 2026, the Mesoxaea texana are back on the South Texas Sand Sheet!

Net-new associated taxa: Berlandier’s Fiddlewood ~ Citharexylum berlandieri

The Mesoxaea texana have returned to the South Texas Sand Sheet several weeks earlier than I had anticipated—April 21, 2026—late in the afternoon, to be exact. There were approximately 7 to 10 individuals buzzing around two Berlandier’s Fiddlewoods that were exploding with blooms thanks to my generous, weekly waterings.

[Puerto Rico, Texas, has been in drought since December 2, 2025.]

Male Mesoxaea texana on Berlandier’s Fiddlewood.

The rare bees were spotted initially, on this day, at approximately 2:54 p.m., nectaring and collecting pollen from the two Berlandier’s Fiddlewoods I planted a few years back. The rare bees continued to hang out and remain on the Fiddlewoods the rest of the day—even right up until dusk was giving way to the first few minutes of darkness falling over the South Texas Sand Sheet, which was approximately 7:58 p.m.

Female Mesoxaea texana on Berlandier’s Fiddlewood.

Thankfully, I was able to get a picture of “El Guapo,” a handsome, male Mesoxaea texana, sleeping in the curved, green leaves as a gentle Southeasterly breezed rocked him to sleep. This is a sight I may never get to see again, and I do feel blessed to have had this opportunity to photograph it for us.

Slide show for your review and enjoyment:

Thank you for your time!

The post “El Guapo,” our rare Mesoxaea texana, catching some Z’s on the South Texas Sand Sheet! appeared first on El Mesteño® Ranch and Arboretum.

Mesoxaea texana update from the South Texas Sand Sheet, and guess what? The Protoxaea gloriosa are back!!!!!!!

Camille — Sun, 25 May 2025 16:25:55 +0000

Male Protoxaea gloriosa nectaring on Waltheria indica on May 21, 2025! It’s been four long years since I last laid eyes on them!

by C. M. Rich, Texas Master Naturalist

Dear Fellow Nature Enthusiast,

As I was making the rounds on my little place out in the South Texas Sand Sheet on Saturday, May 17, 2025, scouting for bees, birds, butterflies, and blooms, I was ecstatic to see and record a male Mesoxaea texana (Mt) nectaring on Waltheria indica once again! Just like clockwork, and according to the records I have been keeping in my phenology journal, it was time for Mt to return!

The male Mt, which I have affectionately nicknamed “El Guapo” back in 20221” did not disappoint me. However, what made El Guapo’s sighting even more remarkable is that it was heralded just moments before by its fellow subfamily Oxaeinae member, the Protoxaea gloriosa!

The Protoxaea gloriosa, which I affectionately nicknamed “El Glorioso” back in 2021, was also nectaring on Waltheria indica!

Alternate view of the male Protoxaea gloriosa nectaring on Waltheria indica.

As an aside, the last Protoxaea gloriosa that I recorded on my place was in the Spring of 2021. Remaining hopeful that “El Gloriosa” would one day return, I have been looking for them ever since. It only took approximately four (4) years of waiting, and it was worth it! Now, I have given myself a photo / video challenge: Record as much of “El Glorioso” as possible.

Protoxaea gloriosa caught in a Lynx spider’s deadly embrace circa May 2021.

My phenology records show a cyclical trend—maybe pattern or cycle might be better descriptions—on the amount of time I might expect to see the Mesoxaea texana and indicate that I will get to document the male a few weeks before the female Mesoxaea texana show up. The overall trends on when the cycle starts and stops for this rare native bee, according to my phenology journal data entries, demonstrate that its arrival on the South Texas Sand Sheet has historically been from the months of May to June—even sometimes carrying over into the first week of July.

Last year, the Mesoxaea texana showed up between approximately May 26, 2024, through July 2, 2024. They were spotted on Salvia ballotiflora. A special treat occurred last Fall, 2024, when the Mesoxaea texana reappeared for a second cycle above the ground on the South Texas Sand Sheet from approximately August 24, 2024, through October 26, 2024. During their second cycle, they were spotted predominantly on Waltheria indica, but were also observed on Salvia ballotiflora, Eysenhardtia texana, and Funastrum cynanchoides.

Over the past four years, I have not been able to conduct the same amount of Citizen Science research for the Protoxaea gloriosa as I have for “El Guapo” because I have not laid eyes on it in four years. My luck seems to be changing this year, however! So now what? What about “El Glorioso?” How long will we possibly get to see it on the South Texas Sand Sheet? Will it be long enough to start collecting data? My hunch about “El Glorioso,” based on what I have learned, is that the patterns I have observed and documented for the Mesoxaea texana, its subfamily member, will also apply and hold true for it as well. I guess we will see. Time (and data) will tell their tale.

Male Mesoxaea texana nectaring on Waltheria indica.

I will be, once again, starting up my intermittent, random walking surveys of all nine monitored sights. I will be looking, in earnest, for their nests this year; it is on my bucket list to be able to document them! I will continue to record ground temperatures at the monitored sights, track rainfall, record what’s blooming, and generally keep my eye out for anything that seems remarkable and worthy of note during these two rare, native bees time above the ground in this cycle of their lives on the South Texas Sand Sheet.

A slideshow for you:

Please stay tuned! There is more to come, and thank you for your time!

The post Mesoxaea texana update from the South Texas Sand Sheet, and guess what? The Protoxaea gloriosa are back!!!!!!! appeared first on El Mesteño® Ranch and Arboretum.

“Female Mesoxaea texana on the South Texas Sand Sheet”

Camille — Tue, 08 Oct 2024 14:32:49 +0000

by C. M. Rich, Texas Master Naturalist

Female Mesoxaea texana nectaring on Waltheria indica.

Thank you for visiting elmestenoranch.com!

The post “Female Mesoxaea texana on the South Texas Sand Sheet” appeared first on El Mesteño® Ranch and Arboretum.

“Making more Mesoxaea texana on the South Texas Sand Sheet”

Camille — Mon, 07 Oct 2024 14:38:28 +0000

by C. M. Rich, Texas Master Naturalist

Female: Shiny, black eyes ~~~ Male: Green, jewel-toned eyes

When I first encountered these two rare bees, they were in flight.

In fact, they flew right in front of me, and I almost ran into them.

I was confused as to what I was seeing.

Front view of the two, conjoined Mesoxaea texana in the act of copulation.

Initially, these two rare bees appeared to be a very long insect flying about three (3) feet above the ground.

It took me a few seconds to realize that this “really long insect” I had nearly bumped into was actual two Mesoxaea texana—conjoined—while in flight.

The Texas native plant these two Mesoxaea texana alighted on was a Salvia ballotiflora, also known as Shrubby Blue Sage.

By the way, this plant has been observed to be a favorite nectar and pollen source for them.

These two remained conjoined for quite some time.

Rough estimates, based on the metadata for all images and videos taken that day, suggest that they were in this state for approximately several minutes.

I have been stewarding this land for these bees since the Fall of 2020.

Their watch, care, and preservation has turned into one of the main “Passion Projects” of this chapter of my life.

Stay tuned. There is definitely more to come.

Thanks for your time!

The post “Making more Mesoxaea texana on the South Texas Sand Sheet” appeared first on El Mesteño® Ranch and Arboretum.

“Mesoxaea texana nectaring on Waltheria indica on the South Texas Sand Sheet!”

Camille — Mon, 02 Sep 2024 03:38:17 +0000