Squirrels Removed, Owls Return

Screech owl cam’ viewers will be pleased to know that, although there's nothing to view yet, with the removal of the squirrels, the owls are checking out the nest box with increasing frequency. (Yeah, I'll probably graph it, but not at the moment.)

I have to hope that they won't actually begin nesting until March, as has been the case most years, because I still have to integrate a

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Removing Squirrels from the Owl Box

One unpleasant chore done: I've removed three very nice fox squirrels from the owl box. It always makes me feel like a bully and a scoundrel, but if the owls are going to nest in the box, the squirrels have to go. It's likely they'll be back in about a week, but the process of making the owl box feel like a dangerous place to be a squirrel is underway. In the meantime, when the owls poke their

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Egg no. 1 of 2013

The first egg of 2013 was laid sometime this morning, about five weeks ahead of last year’s schedule. Expect the Nest Box Cam’ page to be fully updated later today.



Also, I’ve seen Chris Cooley’s work on the new “Owl Nest Box” app for iPhone and (and, new for this year, iPad). It’s looking good, but work is still underway. Regrettably, quickly making last year’s app available on the App Store

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Owl Cam’ Goes Live for Pre-Nesting Activity

Owl Cam’ viewers can now witness the current pre-nesting behavior. With an owl consistently spending the day in the nest box, I’ve fired-up the nest box cam’, even though nesting may still be some weeks away, and have modestly improved the main page, primarily with the simple addition of the small, five minute, time-lapse movie from 12 hours earlier (it sits directly beneath the current five

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How Owls Turn Their Heads Without Tearing Arteries

Thanks to Ruth F. for this article on an aspect of vertebrate physiology that I'd never even considered: How Owls Spin Their Heads Without Tearing Arteries.

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Keeping Squirrels out of Owl Nest Boxes

I've been lucky this year and had no problems with squirrels in my screech owl nest box. Significantly, I think I know why.

Upper-left: Screech owl nest box in gray.Middle: Fox squirrel nest box in green.

Though I've seen fox squirrels taking an interest in my squirrel nest box at various times, for lack of built-in video cameras or other instrumentation, I remained unclear as to what, if

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The Best Screech Owl Photo I Never Showed You

Readers with long memories may recall my mentioning that I'd setup an experiment during the last week of my 2012 screech owl nesting. The experiment was a home-brew motion sensitive trigger for my digital SLR camera, with trigger and SLR mounted such that they could catch the adults as they flew back and forth from the nest box. (You can see the sensor in the photos; it's the white plastic thing

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Mme. Owl Spends the Day in the Next Box

Mme. Owl, in a move that I hope has nothing to do with impending eggs (it’d be about 10 weeks too early for eggs around here), spent the entire day of January 2nd, 2013, in the nest box, starting at 6:28 AM CST and ending at 6:01 PM CST. The movie below shows all of the portions that triggered automatic recording. (In future, I will allow movement in more of the nest box to trigger recording.)

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May 3, 2012: A Most Unusual Food Delivery

What makes this food delivery unusual? First it happened during the day. Second, it was a whole mouse (wondered where my bold bird feeder mice went to). Third, Mme. Owl was spending daytime outside the nest due to the heat, but showed-up, called to her mate, and eventually he arrived with this mouse, still in daylight, a time when screech owls especially do not want to be seen. So this is one of

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December 29/30 Mme. Owl Visits Again

Mme. Owl visits the nest box once again, complete with egg depression work. Not sure what more to say, except that, if all of these visits start to look the same, the frequency of them is well worth observing and recording. Also, at some point, we should witness the male owl call to his mate from the nest site, as part of, what I believe to be, the start of the mating ritual (“See: I found you a

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December 28/29 Nest Site Preparation

Mme. Owl stopped by the nest box at 6:04 AM CST to do a little nest site prep. That consists, as usual, of kicking around the bedding material to make a depression for the eggs she’ll eventually lay. Another means to the same end, not seen here, is for the female to push the bedding material around using her breast like the blade of a bulldozer. That behavior, however, may be reserved for looser

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December 27/28 Mouse Withdrawal

Whichever of the owls (I suspect Mme. Owl) deposited the mouse in the nest box last night (December 26/27) was back tonight to make the withdrawal. Think of it as getting dinner from the leftovers in the fridge.


December 28, 2012, 3:14 AM CST29.6 MB MPEG-4 movie.

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December 26/27 Owl Visits

There were two screech owl visits to the nest box last night, December 26/27, 2012.

In the first visit, at 1:54 AM CST, Mme. Owl gives herself away by briefly kicking around the bedding material, which is a classic female screech owl behavior: making a depression for her eggs (even though there shouldn’t be any until March).



December 27, 2012, 1:54 AM CST29.6 MB MPEG-4 movie.


The

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2012 Owlet Family Portrait

I gather some loyal followers have been waiting (and waiting, and waiting) for the official 2012 Owlet Family Portrait. Well, happy Christmas, and merry holidays; wait no more.




From left to right, that’s owlet 4, 2, 1 and 3 (ages in days: 25.16, 28.15 ±16 min, 28.2 ±54 min, and 27.19). Owlet no. 1 tested its wings on a number of occasions by flying away from the photo shoot, forcing me to

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Owls from the Archives: Being Pushed Around

Yesterday’s video showed the owlets, almost ready to leave the nest, competing for food deliveries. This video shows them a month earlier. A lot can change in a month.


April 23, 2012, 3:07 AM CDT16.7 MB MPEG-4 video.

Mme. Owl is seen here engaging in one of her routine brooding duties: shuffling and rolling eggs. The former you can see, at least for two eggs. The latter is being done

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Owls from the Archives: How to Get Fed

Here's something from the video archives that accumulated during this year’s nesting season: owlet food begging, and two food deliveries. As one of the owlets has learned, and demonstrates with the second food delivery, the best way to make sure that you’re the one who gets fed is to be the owlet nearest the entryway.


May 23, 2012, 9:21 PM CDT17.5 MB MPEG-4 video.

If you’re remembering

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December 20/21 Owl Visit

The owls (or at least one of them) continue to monitor the nest box. Since live owlets emerged from this nest site this year, it will be their first choice for a nest site this coming year. Therefore, they probably give it far more attention than any other cavity in their territory. It’s been a long time since I was able to gather data on the frequency of owl visits to their would-be nest site

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Owls Return After Nest Box Maintenance

Last Sunday, December 16, I brought the screech owl nest box down, removed the long-since unnecessary owlet rail in order to discourage squirrels, and gave the camera windows and compartment interiors a thorough cleaning, so the cameras could acquire clear pictures again. Also, as part of my eternal, and perpetually failing, quest to eliminate hum in the audio signal, I added some ferromagnetic

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Owl Cam’ Acquires Real-Time Animations

Stealing Inspired by an idea from my old friend Chris Cooley, author of the Owl Nest Box app, I’ve created pages (for now, and 12 hours ago) that animate the last four minutes of activity in the nest. There’s nothing like animation to make even tiny motions clearly visible, so these new pages reveal that those times when nothing seems to be happening are, far more often than not, merely a

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Owl Cam’ Acquires -12 Hours Views

My eastern screech owl nest box cam‘ has acquired a new set of viewing options: The “twelve hours ago“ views. I see these as a major enhancement for everyone whose sleep schedule overlaps night here in Austin, and thus the owls’ period of maximum activity.


In the past, for instance, schools in the UK have been able to use this cam’ as an educational tool, but not (for the most part) schools in

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