Tierra de Oro Laboratory https://tdolab.org Physiology and Ecology in the Pinyon-Juniper Savanna Thu, 29 May 2025 17:00:47 +0000 en-US hourly 1 https://wordpress.org/?v=6.8.1 https://i0.wp.com/tdolab.org/wp-content/uploads/2025/01/Stink-Beetle-sq512_512.jpg?fit=32%2C32&ssl=1 Tierra de Oro Laboratory https://tdolab.org 32 32 241164284 Western Bluebirds: One Cycle Complete https://tdolab.org/western-bluebirds-one-cycle-complete/ https://tdolab.org/western-bluebirds-one-cycle-complete/#respond Thu, 29 May 2025 17:00:47 +0000 https://tdolab.org/?p=1101 Although the screech owls have been hogging all the attention this spring, many more birds are raising families in the area. Spotted towhees, Bewick’s wrens, lesser goldfinches, and chipping sparrows can be observed singing their songs and collecting food for their offspring.

We have been very lucky to have a clear view of a pair of western bluebirds. There has been a nest box on the back lot for many years. Last fall, it was time to replace the old, battered box with a new one, and the birds settled in early this spring.

Female western bluebird on nest box. 3/11/25.

They were getting things ready by the beginning of March.

Bluebirds staking out their nest on a cold spring morning. 3/15/25.

Despite the cold, they were ready to get started. Note the fluffed feathers in the photo above.

Mom peeking out of the box. 4/25/25.

The process was largely mysterious, with the parents coming and going during April and May, but no sightings of the nestlings.

The babies finally started sticking their heads out in May. Mom and dad brought food on a regular basis/

Nestling ready to test its wings and become independent. 5/23/25.

By the last part of may, the kids were ready to see the world. Within a day of showing their heads, everyone was gone.

Female starting the next nest. 5/29/25.

I cleaned out the old nest a few days after the fledglings left, and was surprised to see a pair of bluebirds bringing new materials less than a week later. It is impossible to say whether these are the same parents, but it seems likely. They can often raise more than one clutch per year, so maybe we’ll see more fledglings in a few months.

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Owl Cam: Maybe a Week To Go https://tdolab.org/owl-cam-maybe-a-week-to-go/ https://tdolab.org/owl-cam-maybe-a-week-to-go/#respond Sat, 17 May 2025 17:12:22 +0000 https://tdolab.org/?p=1022 The owlets in the nest box have been growing at an astounding rate, and are well on their way to fledging. The parents have been delivering food constantly, and the chicks get more active and inquisitive all the time.

Sleepy parent having a look out the doorway. Credit Terry Morgan, 5/10/25.

The parents have been out and about quite a bit, and seem unbothered by the presence of observers and paparazzi.

Parent, probably mom, resting in the late morning. 5/14/25.

Family Album from Past Years

This seems like a good time to reminisce about past broods. It’s hard to know how long these particular parents have been rearing young in Terry’s box, but screech owls have been nesting there for many years. Terry has many more excellent photos; here is a small sampling.

Parent resting on a chair on the patio. Credit: Terry Morgan.
Four fledglings and a parent (far right) in the eaves. Credit: Terry Morgan.
Fledgling on the patio. Credit: Terry Morgan.
Fledgling in a pinyon tree. Credit: Terry Morgan.

The drama in the nest box continues. Based on past broods, he expects them to fledge on or about May 22. As always, stay tuned for more.

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Amazing Fractals in Motion https://tdolab.org/amazing-fractals-in-motion/ https://tdolab.org/amazing-fractals-in-motion/#respond Tue, 06 May 2025 23:16:48 +0000 https://tdolab.org/?p=997 Here at the lab, we are interested in all sorts of scientific pursuits. At the intersection of art and mathematics, the generation of fractal images can produce some breathtaking results. Dr. Hans Ruppel has been using complex equations to generate beautiful fractal images for some time now. He has been using artificial intelligence to accelerate the process and and take his craft in amazing new directions.

Below is one of his latest creations, which he has fine-tuned for scale and pacing. Enjoy!

I am certain that the beetles would be mesmerized by it if they had better eyesight.

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Owlets Have Hatched! https://tdolab.org/owlets-have-hatched/ Wed, 23 Apr 2025 15:23:25 +0000 https://tdolab.org/?p=930 As Terry predicted, the eggs started to hatch last night. So far three of the eggs have hatched, which is a local record for simultaneous emergence. This may be the result of the female owl having left the first eggs on their own during the early days.

Three owlets sprawled on their siblings’ eggs. 4/22/25.

At the moment, the owlets look like fuzzy blobs, but in the video you can see three sets of wiggly heads, bodies, and wings.

Let’s hope for the other two to hatch successfully in the next few days.

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Spring Is Here: Turkeys, Beetles, and Owls https://tdolab.org/spring-is-here-turkeys-beetles-and-owls/ Wed, 16 Apr 2025 12:56:56 +0000 https://tdolab.org/?p=868 A little warmth brings out a lot of wildlife

In the past week, temperatures have shifted upward dramatically. It’s above freezing every night, and plants and animals have responded appropriately. There is so much to see.

We made a quick trip down to Bosque del Apache Wildlife Refuge near San Antonio, NM. The sandhill cranes are all gone, but there are plenty of ducks and songbirds. We stayed at a house near San Antonio, and were treated to a small group of wild turkeys. The females spent a lot of time foraging near the house, and a male would occasionally stop in and try to woo them.

Male turkey doing his fancy dance and looking just like a Thanksgiving centerpiece. 4/11/25. The download speed may not be quite enough for perfect streaming, so you may want to re-run it for a smoother experience.

There were also a few mammals, such as javelinas and coyotes.

Javelina at Bosque del Apache North Loop. 4/10/25.

We also came across an Eleodes, probably E. gracilis

Eleodes gracilis.

Back at the lab, spring is in full swing. Winter birds, like juncos and robins, have moved on, and summer residents, including lesser goldfinches and Say’s phoebes have settled in.

Some of the year-round residents, such as western bluebirds (and, of course, screech owls) are taking their jobs as parents seriously.

Male and female western bluebird staking out their new box. 3/15/25.

As added enticement, we replaced the old bluebird box with a shiny new one.

Stink beetles are very much making their presence known. One can now find multiple species of Eleodes on a casual stroll around the neighborhood.

Eleodes caudifera found wandering the street. 4/13/25
Eleodes hispilabris on trail near the lab.

Now that the weather has warmed up, this month’s pitfall trap survey was a bit more interesting.

There’s plenty of traffic through the field with the traps, including this big, fuzzy coyote that strolled through the week before the traps were set.

Coyote casually wandering through the field with the traps. The rock behind its right rear foot marks one of the trap sites. 4/2/25.

We caught a few Eleodes sponsa in the traps, along with wolf spiders, ants, and weevils.

Eleodes sponsa after a few measurements i n the lab. 4/12/25.

So the natural world has gone from quiet to extremely busy this month. Don’t forget to check out the updates on the owl cam page if you have a few minutes.

Female owl snacking on some leftover mouse. 4/10/25.

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New Feature: Species Pages https://tdolab.org/new-feature-species-pages/ Sat, 05 Apr 2025 19:10:28 +0000 https://tdolab.org/?p=841 In addition to its other functions, this site serves as a notebook for keeping track of data and references. In our effort to keep a handle on the local species’ characteristics and publications, information about each will be posted on its own page.

Eleodes obscura, participating in notetaking. 9/20/23.

The first species to receive this honor is the prominent, large, and widespread stink beetle, Eleodes obscura. It has been the subject of field surveys, respirometry experiments, and longevity studies here at the lab, and may be the most studied species of Eleodes.

Expect more pages to become active with time. Hopefully, this will become a resource that many people in the community can make use of.

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Owls Settling Down https://tdolab.org/owls-settling-down/ Thu, 03 Apr 2025 16:44:18 +0000 https://tdolab.org/?p=824 Terry’s owls are getting serious about the business of parenting. The female appears to have decided that five eggs are enough, and is incubating them full time. The male has been bringing her mice, and she has been dining in rather than leaving the box to eat them.

Owls in the box. The male (right) has brought a mouse to feed the female while she incubates the eggs. The mouse is in her mouth at the bottom center of the image. 4/2/25.

Five eggs will be a pretty good brood if they all hatch and survive. For the next few weeks, she will be tending them, with the first egg expected to hatch about April 22.

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New Feature: Owl Cam https://tdolab.org/new-feature-owl-cam/ Tue, 25 Mar 2025 00:32:32 +0000 https://tdolab.org/?p=805 New Season of an Ongoing Project

For several years, our neighbor Terry has been recording and posting footage from his camera inside a next box occupied by a pair of western screech owls. He has always had a strong following on Facebook, but for those of us who do not use the platform, he has offered to make the information and videos available here on the Lab web site.

Black and white image of an owl sitting inside a nest box
Owl resting triumphantly after removing the mirror that had been mounted on the upper right. 3/4/25.

Once again, they have prepped the nest box and have started to lay eggs. The first video clips have been uploaded to Terry’s Owl Cam page, along with his comments and a spreadsheet of data regarding previous broods.

New videos and commentary will be uploaded regularly, so stay tuned for plenty of drama and excitement. There are two eggs now, with more to come, and then it will be about another month before they hatch. Once the eggs hatch, there will be a festival of cuteness as the little fuzzballs eat and grow for roughly another month before they fledge.

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Life in the Frigid Wastes https://tdolab.org/life-in-the-frigid-wastes/ Sun, 09 Mar 2025 21:30:57 +0000 https://tdolab.org/?p=750 Arthropods Active in the Cold

Field with small trees, bushes, and grasses, covered in a few inches of snow.
Pitfall trap array after a night of snowfall. The blue flags marking the locations are visible, but the traps are difficult to find. 3/8/25.

The pitfall traps were set this month with the expectation that it would be too cold for small arthropods to be active. The data would serve as a baseline for later surveys, when bugs would be more active. As if to emphasize this point, we got a few inches of snow the night before the traps were to be collected.

Snow with some grass poking through and a blue flag in the middle.
Pitfall trap under snow. It is somewhere near the flag. 3/8/25.

Even though each trap was marked with a flag and had a big rock on top, some were hard to find under the snow, and I had to be careful to avoid spilling too much snow into the cups.

When I got them back to the lab, I was in for a surprise.

Ant with reddish head and thorax, brown abdomen, and long legs.
Ant caught in pitfall trap. Species unknown, but not Pogonomyrmex. 3/8/25.

The cups were not overflowing with life, but there was plenty to see. The most common insects were ants. About half (maybe 5) were the large, leggy species shown above. The rest were the much smaller species shown below. Sorry there’s no scale, but they were moving too quickly for that. I preserved some, so may post better photos later.

Small ant species. 3/8/25.

There were also quite a few springtails (Collembolans), probably of several species.

Tiny insect with long antennae.
Springtail caught in pitfall trap. 3/8/25.

They are extremely tiny, and I know little about them, so all I can say at this point is that there were springtails active in the neighborhood.

Brown spider with light markings on dusty background.
Spider from pitfall trap. 3/8/25.

There were also at least three spiders, of at least two species. According to iNaturalist, the spider shown above is a ground crab spider in the genus Xysticus.

Most exciting were two species of beetles.

Weevil on light background.
Grey weevil with dark blotches, covered with coarse hair. 3/8/25.

One weevil fell into a trap. It is about 6 mm from nose to tail. Looks somewhat like Ophryastes, but I am not certain.

Hairy, reddish beetle larva next to a millimeter ruler.
Beetle larva, probably in the family Melyridae. Note the relatively long thorax and the urogomphi (spiky things) extending from the end of the abdomen. Ruler scale is millimeters. 3/8/25.

There were also two larvae that looked like they were in the family Melyridae, or soft-winged flower beetles. They looked identical to each other, so maybe they are relatively common around here. The larval biology of most beetles, including the Melyridae, is not well documented, so it may be impossible to determine the species of these guys.

It was a pleasant surprise to find some little arthropods in the traps this month, especially a few species of beetles.

There were, however, no Tenebrionids as yet. In that way, this month’s collection does actually serve as a control. I expect that we may find some of them when the traps are reset in early April.

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Setting Up Pitfall Traps for Beetle Surveys in 2025 https://tdolab.org/setting-up-pitfall-traps-for-beetle-surveys-in-2025/ Tue, 04 Mar 2025 23:12:46 +0000 https://tdolab.org/?p=730 Starting surveys for 2025

Photo of grassland with a small cholla cactus in the center foreground, small juniper and pinyon on the right side, and larger junipers in the background. Small blue flags are located at regular intervals.
Trap location, looking northeast. Small blue flags remain in place to mark locations of traps. One trap, with a painted cover held down by a rock, can be seen in front of the cholla cactus. 3/3/25.

Inspired by comments from my friend and colleague Dr. Drew Talley, and conversations with a local Master Gardener, we set up a small array of pitfall traps to collect and record beetles over the course of the year.

It is a 3 X 3 grid, so nine traps total, spaced 3 meters apart. We set out flags to mark the locations of the traps in a section of the back acre of the lab where foot traffic was minimal.

Blue plastic cup buried in red sand surrounded by grasses.
Pitfall trap, consisting of a plastic cup buried to the rim . Note that the rim is flush with the soil. 3/4/25.

The traps are plastic party cups, buried to the rim. The soil is quite loose, so placing the traps was easy.

Painted wooden square, with legs partially buried in soil. Rock on top.
Pitfall trap with plywood cover. Legs are partially buried, leaving space for entry of beetles. 3/4/25

Once the traps were in place, we put plywood covers over them to keep debris out and shield any animals that fall in.

Plywood covers with wooden legs, unpainted.
Plywood covers for pitfall traps before painting. Covers are 6 X 6 pieces of plywood with 3/4 wooden dowels screwed into place.

The covers are 6″ X 6″ pieces of plywood, each with three legs made from 3/4″ dowels. The 3″ legs allow them to be partially buried for stability. Once screwed together they were given a few coats of latex paint to protect them from the elements.

We’ll set traps for the first week of each month, for five nights at a time.

I have not seen beetles in the neighborhood before April, so it is unlikely any will fall into the traps this month. Knowing when beetles are not active provides an important baseline for when they first appear.

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