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Fotos / Sonidos

Observ.

pogolumina

Fecha

Febrero 13, 2020 03:59 PM MST

Descripción

Catalina State Park

Sunny
AIR TEMP: 19.4°C/67°F
ELEVATION: approx. 822m/2696ft

Pogonomyrmex pima

4 nests/nest openings in fairly close proximity (all fit within a circle approx. 1.75m/5.7ft in diameter). 3 of the entrances surrounded by extremely fine, dark sand. The other was cryptic.

Many solitary foragers – one was seen carrying a live termite. Also some nest maintenance was being performed.

These ants were differentiated from the very similar Pogonomyrmex imberbiculus by the lack of the prominent, forwardly directed projection in front of each antennal fossa that is present in imberbiculus. Also, the dorsal surface of the petiolar node not strongly rugo-reticulate, as in P. imberbiculus.

DLQ LOC: A20171

Fotos / Sonidos

Observ.

pogolumina

Fecha

Enero 19, 2020 12:57 PM MST

Descripción


Sahuarita, Arizona, USA

Sunny
TEMP: 22°C/71°F
ELEVATION: approx. 898m/2945ft

Acromyrmex versicolor

One of several large, multi-cratered colonies along side of road. Tall, sharp edged volcano-like nest mounds. Lots of activity – both nest maintenance and foraging. Workers retrieving plant material, including mesquite leaflets, from the ground.

Note: also many Veromessor pergandei colonies in area.

DLQ LOC: A20165

Fotos / Sonidos

Observ.

pogolumina

Fecha

Enero 19, 2020 01:44 PM MST

Descripción


Sahuarita, Arizona, USA

Sunny
TEMP: 22°C/72°F
ELEVATION: approx. 961m/3152ft

Acromyrmex versicolor

Medium (approx. 1 foot diameter) nest in soft disturbed sandy soil at edge of road. Actual nest structure was not visible due to large amount of green leaf material present. Only the nest opening was clear of leaves. Nest opening consisted of a vertical, cave-like hole. A large number of foragers were retrieving thin green leaves from beneath a shrub (Dodonaea viscosa) in a nearby wash about 10-12 feet away and depositing the material on, and around the nest. Only a very few workers were actually seen to enter the nest with a leaf - almost all were left outside.

DLQ LOC: A20167

Fotos / Sonidos

Observ.

pogolumina

Fecha

Enero 19, 2020 12:24 PM MST

Descripción


Sahuarita, Arizona, USA

Sunny
TEMP: 21°C/70°F
ELEVATION: approx. 898m/2945ft

Acromyrmex versicolor

Approx 20 workers on surface of small, low nest. A sparse foraging trail extended to the north. Workers were moving quite slowly.

DLQ LOC: A20163

Fotos / Sonidos

Square

Observ.

pogolumina

Fecha

Enero 19, 2020 10:21 AM MST

Descripción

Saguaro National Park (West) – Bajada Loop Drive

Sunny
TEMP: 15.5°C/60°F
ELEVATION: approx. 817m/2680ft

Acromyrmex versicolor

Very small (7 in) mound/crater in sandy soil on dirt road (close to edge of road).

About a dozen smaller workers on nest surface. They were moving very slowly due to the relatively low air temp. Small amount of leaf fragments on nest.

DLQ LOC: A20162-B

Fotos / Sonidos

Qué

Hormiga Novomessor cockerelli

Observ.

pogolumina

Fecha

Enero 19, 2020 09:59 AM MST

Descripción

Saguaro National Park (West) – Bajada Loop Drive

Sunny
TEMP: 15.5°C/60°F
ELEVATION: approx. 817m/2680ft

Novomessor cockerelli

Large gravel nest with large central opening, in somewhat rocky soil. Several workers milling about and conducting light nest maintenance.

Distinguished from Novomessor albisetosus by the following: in N. cockerelli; longitudinal cephalic rugae do not extend all the way to the posterior border of head, also head extremely elongate, and the nest structure was typical of N. cockerelli.

DLQ LOC: A20162

Fotos / Sonidos

Qué

Hormiga Chicatana Negra Atta mexicana

Observ.

pogolumina

Fecha

Enero 1, 2020 01:52 PM MST

Descripción

Organ Pipe Cactus National Monument, AZ, USA

Sunny
TEMP: 18°C/64°F
ELEVATION: approx. 175m/1500ft

Atta Mexicana

Many hundreds of Atta mexicana workers foraging at edge of an arroyo/wash. Material was being transported to at least 3 lateral tunnel openings (the tunnels can extend more than 100 meters from the central nest location).

Several large majors/soldiers were active at the tunnel openings.

Note the presence of 2 pairs of spines on the promesonotum of Atta, as opposed to 3 pairs of spines on the promesonotum of Acromyrmex.

By the time we found these ants we were extremely tired and hungry, and pressed for time. In the rush to get some usable images, we neglected to positively ID the split and partially dead tree that was the main target of their foraging activities. I think it was whitethorn acacia (Vachellia constricta).

We were extremely careful not to disturb/harm the ants or any other park resources.

For more info on Atta mexicana see the work of Dr. Alex C. Mintzer.

DLQ LOC: A20161

Fotos / Sonidos

Observ.

pogolumina

Fecha

Diciembre 22, 2019 11:22 AM MST

Descripción


Painted Rocks Petroglyph Site, Theba AZ
Stony soil, creosote/bursage scrub

Thin overcast/hazy sun
TEMP: 19°C/66°F
ELEVATION: 175m/576ft

Pogonomyrmex rugosus

No real nest superstructure – just a small amount of gravel, and single entrance hole.
Many workers active - loitering around nest entrance, removing debris from nest interior, and foraging.

P. rugosus and Veromessor pergandei were the dominant ants at this location. We also saw Myrmecosystus sp, and what I am sure was Pheidole gilvescens, but I was unable to get a photo of a major worker.

DLQ LOC: A19158

Fotos / Sonidos

Qué

Hormiga Cosechadora Negra Veromessor pergandei

Observ.

pogolumina

Fecha

Diciembre 22, 2019 11:00 AM MST

Descripción


Painted Rocks Petroglyph Site, Theba AZ
Stony soil, creosote/bursage scrub

Thin overcast/hazy sun
TEMP: 17°C/62°F
ELEVATION: 175m/576ft

Veromessor pergandei

Triple crater. Many workers active – mostly doing nest maintenance, and some scavenging.

Pogonomyrmex rugosus and Veromessor pergandei were the dominant ants at this location. We also saw Myrmecosystus sp, and what I am sure was Pheidole gilvescens, but I was unable to get a photo of a major worker.

DLQ LOC: A19157

Fotos / Sonidos

Observ.

pogolumina

Fecha

Noviembre 24, 2019 11:05 AM MST

Descripción


Casa Grande, AZ

Mostly Sunny
TEMP: 20°C/68°F
ELEVATION: 440m/1444ft

Pogonomyrmex rugosus

Large, low, flat gravel nest mound with single entrance and an auxiliary entrance about 0.8m away.
Lots of activity including foraging on trunk trails. Some workers were seen carrying tiny unidentified seeds back to the nest.

DLQ LOC: A19152

Fotos / Sonidos

Observ.

pogolumina

Fecha

Noviembre 24, 2019 11:30 AM MST

Descripción


Casa Grande, AZ

Mostly Sunny
TEMP: 20.5°C/69°F
ELEVATION: 440m/1444ft

Pheidole xerophila (aka Pheidole xerophila tucsonica)

When first approaching this nest, we saw many agitated majors moving frantically around one of the entrances. Seconds later, a Ph. xerophila worker was seen emerging from the entrance – clutching a invading Solenopsis worker in its mandibles. The two ants struggled for a few minutes until I lost track of them while adjusting the camera.

Another Pheidole major was observed to carry a Solenopsis worker away from the nest and drop it apparently unharmed. One dead Pheidole major was seen about 30cm/12in from the entrance.

DLQ LOC: A19154

Fotos / Sonidos

Observ.

pogolumina

Fecha

Noviembre 24, 2019 10:45 AM MST

Descripción


Casa Grande, AZ

Mostly Sunny
TEMP: 19°C/66°F
ELEVATION: 440m/1444ft

Pogonomyrmex desertorum

We returned to this location to re-visit a Pogonomyrmex pima colony that we observed on March 10, 2019. There was no sign of the P. pima nest – apparently having been obliterated by vehicle tracks, and no P. pima workers were seen.

However, about 12m/40ft south of where the pima nest was, we were surprised to find a Pogonomyrmex desertorum colony! This is my first location for this ant in Arizona (having observed them previously in Texas).

Approx 20 workers were loitering in the area around nest entrance. Several workers were seen ranging farther from the nest – they appeared to be foraging.

The nest consisted of a flat, barely visible sandy/gravel disc approx. 12.7cm/5in in diameter with single entrance.

Pogonomyrmex desertorum is a member of the ‘barbatus complex’, and in many ways the workers look like much smaller versions of Pogonomyrmex barbatus. Unlike P. barbatus though, P. desertorum workers are extremely docile.

This location is near the western limit of this ant’s range, and these workers differed in a couple of ways from the individuals we have observed in Texas. Most notably, in the more eastern portion (e.g. Texas) of P. desertorm’s range, in the words of A.C. Cole; “the posterior corners of the head are strongly shining and free of sculpture.” In this more western portion of P. desertorum’s range, again, in Cole’s words; “the cephalic rugae have encroached for such a considerable distance into the posterior corners of the head that some workers of a nest series may have these parts almost completely covered with very fine rugae which are sufficiently dense to obscure almost entirely the shining surface.”

DLQ LOC: A19151

Fotos / Sonidos

Observ.

pogolumina

Fecha

Noviembre 24, 2019 10:35 AM MST

Descripción


Casa Grande, AZ

Mostly Sunny
TEMP: 18°C/64°F
ELEVATION: 440m/1444ft

Pheidole xerophila (also known as Pheidole xerophila tucsonica)

Typical Ph. xerophila colony with three tiny mounds/entrances, in fine, sandy soil.

Many major workers active. These ants were moving slowly because of the relatively low air temperature – allowing me to get good diagnostic photos.

DLQ LOC: A19150

Fotos / Sonidos

Observ.

pogolumina

Fecha

Noviembre 17, 2019 02:07 PM MST

Descripción


Tonto N.F. - Four Peaks Wilderness Area

Pheidole xerophila

This nest had 3 small mounds, each with a single entrance hole. Much activity, with numerous minor workers foraging along trunk trails. Only 1 major worker seen. This individual was missing 2 legs and part of its left antenna.
There are many other Ph. xerophila colonies in this area.
NOTE: This variant is also known as Pheidole xerophila tucsonica.

Sunny
TEMP: 25.5°C/78°F
ELEVATION: 790m/2592ft

DLQ LOC: A19149

Fotos / Sonidos

Qué

Hormigas de Fuego Género Solenopsis

Observ.

pogolumina

Fecha

Noviembre 17, 2019 12:04 PM MST

Descripción


Tonto N.F. – Blue Point Rec Area

Solenopsis xyloni

Workers moving quickly (in both directions) between 2 unadorned nest entrance holes approx. 1.8m/6ft apart. Majors and minors present. Some minors appeared to be conducting nest maintenance. No eggs or larvae seen (which would have suggested a colony move).
They did not react to my presence. Workers appeared jet black to the naked eye.

Sunny
TEMP: 28°C/82°F
ELEVATION: 426m/1397ft

Fotos / Sonidos

Qué

Hormiga Cosechadora Roja Pogonomyrmex barbatus

Observ.

pogolumina

Fecha

Noviembre 17, 2019 10:42 AM MST

Descripción


Tonto N.F. - Granite Reef Rec Area

Pogonomyrmex barbatus

Nest with single entrance in soft, sandy soil. No gravel mound present.
Many workers active. Some seen retrieving dry plant parts.
Not particularly aggressive.

This is the 3rd P. barbatus colony we have found at this general location.

Sunny
TEMP: 23°C/74°F
ELEVATION: 405m/1330ft

DLQ LOC: A19145

Fotos / Sonidos

Observ.

pogolumina

Fecha

Octubre 20, 2019 11:44 AM MST

Descripción


Catalina State Park, near Tucson AZ

Acromyrmex versicolor

Multi-cratered colony on open ground, in full sun, at side of road.

A few workers doing nest maintenance.

Sunny
TEMP: 26°C/79°F
ELEVATION: 815m/2674ft

DLQ LOC: A19142

Fotos / Sonidos

Observ.

pogolumina

Fecha

Octubre 20, 2019 10:27 AM MST

Descripción

Catalina State Park, near Tucson AZ

Pogonomyrmex rugosus

Very active nest. Organic material going in and out. Workers seemed about 10-15% smaller than typical. Not very aggressive for this species.

Sunny
TEMP: 24°C/75°F
ELEVATION: 823m/2700ft

DQ LOC: A19141

Fotos / Sonidos

Observ.

pogolumina

Fecha

Octubre 20, 2019 10:19 AM MST

Descripción

Catalina State Park, near Tucson AZ

Acromyrmex versicolor

Extremely cryptic Acromyrmex versicolor nest near base of large Mesquite. No nest superstructure could be seen – only entrance holes in/under heavy leaf and twig litter. Only a few minor workers active (foraging).

Sunny
TEMP: 23°C/74°F
ELEVATION: 823m/2700ft

DLQ LOC: A18026

Fotos / Sonidos

Qué

Hormiga Cosechadora Pogonomyrmex californicus

Observ.

pogolumina

Fecha

Octubre 20, 2019 09:03 AM MST

Descripción

Catalina State Park, near Tucson AZ

Pogonomyrmex californicus

12 -14 workers were loitering near the nest entrance.

About 10 inches away from the nest entrance, several tenebrionid beetles (Eleodes sp?) appeared to be digging several millimeters into the soft, sandy surface of the ant mound. Three P. californicus workers half-heartedly harassed the beetles by nipping at various appendages. The beetles were not seen to employ any chemical defenses, but merely knocked the ants away with a quick flick of their legs.
There were many of these beetles on the ground in the area – none of the others were seen on, or near ant nests.

Sunny
TEMP: 19°C/67°F
ELEVATION: 819m/2687ft

DLQ LOC: A19138

Fotos / Sonidos

Qué

Hormigas Citronela Género Lasius

Observ.

pogolumina

Fecha

Agosto 25, 2019 09:35 AM MST

Descripción

I’m pretty sure this is Lasius (Acanthomyops) arizonicus.

Wing (1986), states that Lasius arizonicus is “similar in appearance to Lasius interjectus”. As can be seen in these photos, the long hairs on the gaster are restricted to the margins (posterior edges) of the tergites, as is the case with L. interjectus.

The propodeum is strongly convex, the color is yellow/gold (worker), body surface highly glabrous, and the petiolar scale is “moderately sharp, and weakly to strongly emarginate” (Wing 1986).

Finally, the ants I photographed for this post seem to be a good match to Alex Wild’s images of L. Arizonicus.

Observational notes:

The ants were frantically building/enlarging a volcano-like nest structure with a circular opening approximately 40mm/1.6 inch in diameter – presumably in preparation for a mating flight. I will add images of the nest later.

Workers were not aggressive, and no reproductives were seen.

------------

Madera Canyon, Madera picnic area, oak/juniper forest, partial shade.
Mostly Cloudy, and apparently it had rained the night before – the soil was quite moist.

TEMP: 24°C/75°F
ELEV: ~1475 m/4840 ft
DLQ LOC: A19130

Fotos / Sonidos

Observ.

pogolumina

Fecha

Agosto 4, 2019 09:24 AM MST

Descripción

Madera Canyon.

Sandy soil, oak / juniper forest. Nest at edge of rock, with one main entrance hole and possibly a smaller secondary entrance.

5-6 workers visible at any given time, foraging, and removing soil particles and organic material from the nest. One worker was carrying out what appeared to be fungal substrate. Another worker returned to the nest with an unidentified green leaf.

Workers moved at a steady, moderate pace, and were not aggressive.

Sunny
Air Temp: 27°C / 81°F
Elevation: 1475 m / 4840 ft
DLQ LOC: A19128

Fotos / Sonidos

Observ.

pogolumina

Fecha

Abril 17, 2019 12:16 PM MST

Descripción

Acromyrmex versicolor.
Minor, media, and major workers foraging and conducting nest maintenance. Also, at least 2 dealate females present and active. The queens were even observed ‘helping’ with nest maintenance/building.
This nest consisted of a single (probably new), unadorned entrance hole – located about 10 ft away from a complex of typical, but abandoned A. versicolor nest craters.

Sunny
Air Temp: 28°C / 82°F
Elevation: 159 m / 523 ft
DLQ LOC: A19122

Fotos / Sonidos

Observ.

pogolumina

Fecha

Abril 17, 2019 09:34 AM MST

Descripción

Pogonomyrmex magnacanthus. Unofficial common name: ‘the big-eyed harvester’.
Some workers were tentatively peering out of the nest entrance, while a few others foraged singly. Workers were ‘shy’ and non-aggressive. Nest was approximately 3 inches in diameter and consisted of a barely visible, eroded patch of fine sand with a single entrance - located in loose, sandy soil.

Sunny
Air Temp: 22°C / 71°F
Elevation: 138 m / 454 ft
DLQ LOC: A19121

Fotos / Sonidos

Qué

Hormigas Mieleras Género Myrmecocystus

Observ.

pogolumina

Fecha

Marzo 27, 2019 12:18 PM MST

Descripción


I’m not sure if this Myrmecocystus mimicus, or one of the other almost indistinguishable species…

Mostly Sunny
AIR TEMP: 82°F/28°
ELEVATION: 4720 ft/1439 m

Fotos / Sonidos

Observ.

pogolumina

Fecha

Abril 1, 2019 08:51 AM MST

Descripción

With an air temperature of 60°F/15.5°C, these Pogonomyrmex huachucanus workers were just becoming active.

These small Pogos (Ephebomyrmex group) forage singly for seeds and dead insects/insect parts. The small colonies (probably fewer than 200 workers) are usually found at higher elevations, and nest entrances are often cryptic.

Sunny
60°F/15.5°C
ELEVATION: ~ 4700 ft/823 m

DQ LOC: A19114

Fotos / Sonidos

Observ.

pogolumina

Fecha

Marzo 27, 2019 09:41 AM MST

Descripción

Pheidole rhea is said to be the largest Pheidole species in North America. Ph. rhea is trimorphic, with minor, major and supermajor castes. Supermajors have a head width of 3.86mm, and the propodeal spines of all castes are unusually long.

This nest (3-inch shallow soil crater) is located along the edge of a paved sidewalk. There was an approx. 15ft/4.6m foraging trail that followed the edge of the walkway, then fanned out into tall grass. Many minor workers were returning to the nest with unidentified seeds. The foraging trail was patrolled by an occasional major, or supermajor.

Partially sunny
AIR TEMP: 73°F/23°C
ELEVATION: 4436 ft/1352 m

Fotos / Sonidos

Qué

Hormiga Cosechadora Pogonomyrmex californicus

Observ.

pogolumina

Fecha

Marzo 20, 2019 01:00 PM MST

Descripción


A huge group of beautiful Pogonomyrmex californicus workers huddling at nest entrance. This same behavior was observed at this exact nest on March 6th, 2019 as well, but not seen at any other P. californicus nests in the area, then or since. It does not appear to be weather related, as conditions on both occasions were very different.

Partly Sunny
AIR TEMP: 84°F/28°C
ELEVATION: 1348ft/411m
DLQ LOC: A19108

Fotos / Sonidos

Square

Qué

Hormiga Cosechadora Roja Pogonomyrmex barbatus

Observ.

pogolumina

Fecha

Marzo 20, 2019 01:53 PM MST

Descripción

Pogonomyrmex barbatus worker at nest entrance. Large and very aggressive!

Partly Sunny
AIR TEMP: 84°F/28°C
ELEVATION: 1330ft/405m
DLQ LOC: A19083

Fotos / Sonidos

Square

Qué

Hormiga Cosechadora Pogonomyrmex californicus

Observ.

pogolumina

Fecha

Marzo 20, 2019 11:01 AM MST

Descripción

Pogonomyrmex californicus worker carrying a nestmate to an apparently new nest. Many such examples of ‘Adult Transport’ were occurring at this location.

Partly Sunny
air temp: 75°F /24°C
ELEVATION: 1340ft/408m
DLQ LOC: A19103

Fuentes:: Átomo