The Harrington's Barn Owl Box

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07/20/2018 No activity last two nights. New box: On July 4, 2018 we decommissioned the old box, orignially put up in 2007, and replaced it with a new one that I built over the last weeks:
New box July 4, 2018
The cameras are all new with 1080p resolution, and there are many more improvements that I'll describe when time permits. Owl Box
The old box was 30x15x12in. The two internal cameras are in the box at left,  Cam1 (daylight) and Cam2 (IR). The external camera (Cam3) is on the boom at right. The box is supported on two 4" PVC pipes 15 feet long and fastened to the fence post with steel strap. The yellow rope (since replaced with steel cable) behind is used to raise and lower it. It goes over a branch of an oak tree and down to a hand winch attached to the fence out of sight at right. The green rope is used to steady the box when raising or lowering. The orange line is a 3-wire cable carrying power for the cameras and lighting. The cable carries 12 Vdc, 3 Vdc (variable) and ground.  The 12 volts is converted to regulated 5 Vdc at 3.6 amperes (1.2 per camera) in the small box containing the internal cameras, and the 3 volts passes through and is used to power the 16 internal IR LEDs and LEDs for the external camera. The power comes from a battery in a box in the garden that is charged by a 50-watt solar panel. It is backed up by a 12-volt 10-amp power supply in the garage.
07/18/2018 There were a number of problems with the new box, so we brought it down after a few days. It was a lot more work than anticipated but finally finished, and we raised it back up yesterday. We had only one visit overnight, about 10 minutes at 9:30 PM, outside only.
Barn Owl
This is reduced to fit the page from 1080P (1920x1280). The day and night internal cameras are the same, and we expect to have greatly improved images if the owls cooperate.
07/05/2018  Our first test of the new box on July 4, the day we put it up, was very successful with several visits inside and outside. The old box had been down for three nights, so we worried that they might go elsewhere, but they definitely didn't. A couple of stills (infrared):
06/30/2018 We can declare that the breeding cycle begun in January by Dudley and Nell is well and truly over as we haven't seen the young in over a week, and the adults (we assume the same but can't be sure) are acting as though they intend to start over,  mating and hanging out together a lot.
06/25/2018 Starting over? I was hoping for a break so I could switch to the new box, but...
06/22/2018 Thirteen weeks - The young are supposed to go off on their own about now. One has, but the other (Jo) is still hanging around at night begging to be fed. The feedings are less frequent, with just one last night, around 2:25 AM, an average-sized vole or similar. She left with it after about a minute and returned empty-handed (beaked?) a few minutes later and resumed begging.
Jo with vole
06/17/2018 Twelve weeks - We see little of Bo these days, but Jo stays around outside the box most nights looking to be fed. Feedings are fewer, and I couldn't find any at all in last night's recordings. See below a 19-second recording of Jo putting her face right up to the camera. (It is a 720P IP camera with illumination by 850-nm LEDs, which are outside the visible spectrum.)
06/11/2018 Eleven weeks – The routine now is one or two feedings at night in the box; otherwise it's empty, in0cluding daytime. I'm beginning to wish the remaining juvenile would leave so I can get on with the new box, which is almost ready.
06/08/2018 Empty box – We had two days in a row with only one in the box, and today it's empty. There was some activity overnight, however, with at least two feedings, one about 1:38 AM and the other soon after at 1:52 AM, both outside. There were two present at the latter (presumably Bo and Jo) when Dudley showed up with prey. We're at 78 days, or 11 weeks, and the young should go off on their own in another two weeks if not sooner. (I'm building a new box that has better cameras, better lighting, etc.  It looks like it'll be ready about the right time.)
06/06/2018 Quick delivery – I think it's a rabbit (14 sec):
06/05/2018 Outside the box – This is Jo, first time seen outside the box, about 6 AM this morning (external camera in front).Barn Owl (Jo)
06/02/2018 Dancing for dinner – Dudley is still on the job. BTW, Bo is back today after spending a day who-knows-where.
06/01/2018 Only one today – We have only one in the box today, presumably the younger juvenile (“Jo”). According to Wilipedia, they should stay around another three weeks until week 13 while being taught how to hunt by the female. We haven't seen evidence that the mother did the job, but it could have taken place without our knowing it because it would be out of view of the cameras.
Jo
06/01/2018 Delivering to an empty box -See two videos below, first outside where Dudley brings a meal into an empty box. After a bit one of the juveniles goes in for it. The second shows Dudley inside waiting and the juv coming in for it. Dudley then leaves.
05/29/2018 Come and get it! Bo was outside last night about 11:00 on the camera boom when (presumably) Dudley showed up with food. She proceeded to eat right there, the first time we've  seem them either receive food and eat outside. It took her about 2 minutes to finish it, but the interesting part is at the beginning.

View in full size (720P) here
05/28/2018 Bo is now 68 days old, nearly ten weeks, Jo a few days younger. We're worried that their parents aren't doing their jobs well. We haven't seen mother Nell for weeks and she's supposed to be teaching them how to hunt about now according to Wikipedia. Father Dudley seems lax in providing food, with only a couple of deliveries a night (but I probably miss some). He used to make deliveries soon after dark but is not appearing until later these days. When he does, they snatch the prey item from him before he even gets in. Bo is flying but spends most of her time at night outside the box, often on the external camera (which I didn't design for but seems to be OK so far). Jo just a couple of days ago came out, flapping a lot but not flying yet and staying close. See this 5-second clip below from last night where Bo is on the camera to start and Jo is inside looking out. I can't tell exactly what happened, but I think another owl flies in to the entrance, and Bo jumps down and confronts him (Dudley?). The third owl then flies off. Unfortunately, the internal camera didn't come on at that time, so I couldn't tell if Jo grabbed a food item. (Turn on sound.)
05/22/2018 Here's Bo looking out at 6:40 this morning, definitely different from Jo seen on the 20th.
Bo
05/20/2018 Here are two telephoto (500mm) captures taken this afternoon at a distance of about 50 ft. with my D7200 on remote control.  I think it's Jo but not sure.
Jo
Jo
Jo
05/19/2018 Gimme that! It appears to me that food deliveries have been sparse over the last couple of days. Each had a meal last night around 9:00, but I couldn't find any other deliveries until 5:07 this morning. It looks like Bo was really hungry (10 sec):
05/18/2018 Bo is spending a lot of time outside at night but not going far as far as I can see. Jo (younger by a few days) hasn't ventured out of the box yet. I didn't see any food deliveries last night in the recordings, and both spent a lot of time looking out the door. For what it's worth, that gave me a chance to get "portraits" of them at 8 weeks: First Bo, who we're pretty sure is female, and then Jo, probably male.
Bo

Jo
Remember that these are taken with infrared light from LEDs, which is invisible to both humans and owls.
05/15/2018 Bo spent much of the night cavoting between the roof of the box and the external camera. I'm posting three videos below. The first is very short, showing her on the roof and taking off. It's hard to see, but watch her at the end on the right where it's pretty clear that she's taking off:

The next shows her running around on top and jumping onto the camera enclosure and back.

The last (longer) shows her eating a rat in typical manner, first tearing off and eating pieces for several minutes, and swallowing the rest whole (there's a skip toward the end, but it's clear she got it down except for the tail, which takes another while)  (1:49):

05/15/2018 Outside the box - This morning Bo came out of the box and spent a couple of hours there, part of the time on top the external camera. She flapped her wings a lot, but she's not quite ready to fly.
05/10/2018 Another of Bo:
Bo
05/09/2018 Bo at 7 weeks (hatched Mar 21). Fully adult appearance, should fly in around 2 weeks.  Females are more heavily spotted in front (also larger than males), and we can see a few spots on Bo's chest here, so we'll tentatively say Bo is female.
Bo
05/05/2018 Live prey no accident? Here are three video clips showing live prey in the box. The first shows a fairly large rat (or something) running around almost between the legs of one owl. The second shows the same animal at the bottom with the owls just staring at it. The third is the next day where Dudley brings something in and Bo acting very strangely, I think because it's alive and he doesn't know quite what to do about it. Was this on purpose as a lesson?



05/05/2018 Here are two stills of the young, who are practically adult size now. First the pair (Bo on left) looking out the door and then Bo by himself:
Bo & Jo

Bo
04/29/2018 C'mon, take it! Feeding reluctant young (52 sec):
04/28/2018 It's getting hard to tell them apart at 38 and 35 days. They have pretty complete wing feathers but surprisingly (to me) still nothing much but down elsewhere. They're feeding themselves now and obviously getting plenty to eat. They should fledge in another month. Nell roosted elsewhere today.
Bo & Jo
04/26/2018 Nell is spending more time away from the box, which is normal at this stage. The young spend most time when she's gone huddled together in the far end of the box, but sometimes peak out the door. Here they are doing that:
Bo & Jo looking out
04/24/2018 Panic! We had a bit of a panic yesterday because Nell left the box at 3:40 am and didn't return until 7:54 in the evening. Bo and Jo spent most of the day huddled together in the far end of the box. It was quite a joyous reunion when she finally returned:
04/22/2018 Bo feeds himself. Another first with Bo busily feeding himself. At around 2 minutes he attempts to swallow the critter, but it's way too big.
04/21/2018 Jo eats. For the first time we saw Jo eating on her own this morning. She's trying to swallow something that's a bit too big but manages to get some bites off it before turning around - about 2 minutes:
04/19/2018 Nell is taking longer breaks and starts outside stretching legs and wings. Early this morning she hopped up onto the external camera and stretched a foot down in front of the camera (18 sec):

Here's a screen grab of her foot and wing:
Nell's foot
04/17/2018 Here is Bo at 27 days (72 sec):
04/16/2018 Gopher rare: Dudley showed up at 4:06 this morning with a gopher(?) that was still kicking. You can see him worrying it in this clip but finally brings it in (more below):

Meanwhile Nell is wondering what's going on but soon finds out. Dudley leaves and she dispatches the critter pretty quickly.
04/15/2018 This seems odd: Dudley comes in, picks up a food item, and leaves with it (29 sec):
04/15/2018 Nell feeds Bo, including a large piece. It's not clear if Bo succeeded in swallowing it.
04/14/2018 Two images: (1) Dudley bringing something to eat at 1:21 am this morning, and (2) Jo and Bo huddle together while Mom takes a break:
Dudley

Jo & Bo
04/12/2018 Bo (22 days) takes a walk and looks out at the world (infrared):

Here it is with the Day Cam showing Jo (about 19 days) also:
04/11/2018 Bo, Jo and Nell:
Bo, Jo and Nell
04/09/2018 Leaving the kids to play - Nell left them for a while (Bo at 19 days, Jo at 16) (1 min):
04/07/2108 Dudley brought something for the family at 12:28 this morning and did his best to show us what it was (but I still couldn't tell). He dropped it inside and left. Nell picked it up with Bo trying for a bite right away.
04/05/2018 Feeding session: We watched Nell feeding both young in real time, and I recorded 11 minutes manually, trimmed to 6 for posting. Nell has Bo under her right wing and Jo under the left one and is feeding both.
04/05/2018 This video clip from early yesterday has pretty clear sound of the owlets:
04/04/2018 Dudley's last visit yesterday morning was at 6:03, about 3 minutes before the episode with the live mouse, likely when he brought it. Here's a clip from the external camera at that time (29 sec). (The prey appears limp when Dudley picks it up. I have read that prey often go limp on purpose - playing dead, in effect - when captured and try to escape later when they get the chance.)
04/03/2018 We see little of Jo, mostly because Mom stays on top (to keep them warm?) or in front of the owlets. I did catch this still from a recording early this morning (see also live mouse show below):
Nell with Bo & Jo
Dudley brought in food four times last night, the last with some unwelcome excitement:
04/02/2018 Sharing a snack at 1 AM:
03/29/2018
Bo (hatched Mar 21) got out from under Mom for a while around 3 PM this afternoon. This is a long video at 1:41 but shows a lot of activity including I think feeding around 24 seconds. Update: Listen to sound at beginning that may be the "chittering" mentioned at Wikipedia:
03/29/2018 Nell is still sitting on the remaining egg, or where it was because we don't see it this morning. It could be hidden because there's a great amount of debris that has built up. Nell moves only occasionally, so we get few chances to see the egg or hatchlings. We're not sure about Jo. The only good news is that Bo is active and continues to grow, and Dudley is still bringing in food, in fact maybe too much. See 30-second clip below of Nell picking up a carcass and leaving with it, apparently a bit of housecleaning. She returned withou it in about 3 minutes.
03/27/2018 Showing Bo getting kicked by Mom (accidently) and we still have the third egg, which may not be viable.
03/26/2018 In this clip, Bo and Jo at under a week appear to be doing well. The third egg seems to be gone.
03/25/2018 Here is a short (10 sec) clip showing Bo moving around and the third egg still intact:
03/24/2018 We can see more action by the first hatched ("Bo"), and I think we saw it being fed in clip below. The second ("Jo") hasn't stirred that we've seen but is mostly covered by Nell with the last egg still to go. The clip from this morning shows Bo moving near the beginning and again near the end.
03/22/2018 Dudley is working overtime bringing in food. Also notice some motion by the hatchling when she's on her way out for a (bathroom?) break. (We've decided to call the little ones Bo, Jo, and Mo, so this is Bo):
03/21/2018 Early this morning we could see a broken egg but couldn't find a hatchling. Finally, about 9:00 AM we could see what we assume is the hatchling between the two remaining eggs:
Nell with hatchling
See this from Wikipedia: "The chicks are at first covered with greyish-white down and develop rapidly. Within a week they can hold their heads up and shuffle around in the nest. The female tears up the food brought by the male and distributes it to the chicks. Initially these make a "chittering" sound but this soon changes into a food-demanding "snore". By two weeks old they are already half their adult weight and look naked as the amount of down is insufficient to cover their growing bodies. By three weeks old, quills are starting to push through the skin and the chicks stand, making snoring noises with wings raised and tail stumps waggling, begging for food items which are now given whole. The male is the main provider of food until all the chicks are at least four weeks old at which time the female begins to leave the nest and starts to roost elsewhere. By the sixth week the chicks are as big as the adults but have slimmed down somewhat by the ninth week when they are fully fledged and start leaving the nest briefly themselves. They are still dependent on the parent birds until about thirteen weeks and receive training from the female in finding, and eventually catching, prey.[43]"
03/20/2018 Day 33, no hatchling. See 8-sec clip where you can see the three eggs clearly (infrarad):
03/19/2018 It is Day 32 and still no hatchlings. We occasionally get a glimpse of the eggs like this:
Barn Owl "Nell"
03/13/2018 Dudley is pretty regular about bringing in something for Nell to eat around midnight, and he did so last night. It looked a little like Nell had to fight him for it, but he did leave it.
03/09/2018
Hatch day-7
Another surprise: Dudley is staying in today. See clip from early, but he's he's still in at 9 am. Nell is saying, "What's up, mate?":
03/08/2018 Nell often accidently kicks an egg very gently when moving around. It's usually just an inch or two, but yesterday she pushed one egg half way across the floor, pulling it back right away (9 sec):
03/06/2018 Dudley brought in what looks like a vole, which he left for Nell:
Dudley
03/03/2018 All seems well at around two weeks to go to first hatching. Nell is getting plenty to eat, mostly rats (ugh) it appears. Our only worry is that she sometimes takes hours eating, leaving the eggs alone, but we can only trust her instinct on that.
02/27/2018 We knew Dudley was doing his job provisioning but hadn't actually seen him bringing something in until this morning:
Dudley bringing in food
And Nell is on it right away:
Nell & Dudley
Here she is eating it:
02/23/2018 We began to worry over the last couple of days because we didn't see Nell eating. So we were relieved this morning to see her having a good meal, probably a small rabbit. After tearing off pieces for quite a while and several failed attempts to swallow what was left, she finally succeeded. Here she is with her family-to-be (we hope):
Nell with eggs
02/20/2018 Now it's three eggs. Also, she has formed a nest out of debris:
Nell with three eggs
02/17/2018 Two eggs! (Or is it three? Keep tuned.)
Two eggs!
The night cam (infrared) is working intermittently, as here.
Incubation period: Checking at All About Birds, I see the incubation period is 29-34 days, which places the first hatching at March 16-21.
02/16/2018 We have an egg! She laid it about 1:30 PM yesterday. If I remember correctly, the incubation period is 22 days. If correct, that will mean it should hatch around March 9. They lay eggs a day apart, so they hatch that way. A normal brood is up to six - if she lays that many, it'll be very crowded!

(I apologize for the poor quality of the video. It is low resolution to begin with (640x480), and the lens is probably very dirty since it hasn't been cleaned in a year or so. It's a big deal bringing the box down for maintainance, and we certainly can't do it now.)
02/15/2018 Another week and still no eggs. Nell is eating plenty in the box every day, so it's not from lack of nurishment. How the food gets brought in is still a mystery. Here's a short video of her finishing up a gopher, or something:
02/07/2018 Activity by the owls hasn't changed much since the last report except that Nell has eaten in the box in daytime, a good sign but a long way from what we really want to see, namely eggs. She spent a couple of hours yesterday working on what looks like a pretty large rat including trying to swallow it three or four times without success. We couldn't tell where it came from, but it was not there earlier in the day. We would hope that Dudley brought it, but we can't tell. Here's a video with the day cam (50 sec):

In a bit of bad news, the night cam has failed, working only occasionally for short periods.
01/27/2018 Lots of activity in the wee hours but nothing unusual. I think this is Dudley, who left soon after, leaving Nell in the box:
Dudley
01/26/2018 Finally doing his job: For the first time that we've seen, Dudley brought in something for Nell to eat:
01/25/2018 Regular day, both slept in. Dudley has left, here's Nell looking out.
Nell
01/23/2018 Eating in: For the first time for this pair, one of them ate something in the box early this morning. It took over an hour, and she (I assume it was Nell) tried several times unsuccessfully to swallow it. Here's a sample (34 sec):

See also this short clip of them bonding around 4:30 this morning:
01/21/2018 Another week and nothing's changed.
Nell & Dudley
01/15/2018 No report for several days because nothing new has happend - Both sleep in all day and go out at night. Nell usually returns after midnight with Dudley making occasional visits for mating and little else. He returns at sunup and they do it all over again. It seems past time that Nell should have laid eggs but no luck with that. We're still hoping...
01/11/2018 The sun is up, and they're both in, preumably for the day. This is encouraging because we haven't seen much of Dudley recently, and we feared that he wasn't going to step up to his responsibility.
Dudley & Nell
01/10/2018 After no activity overnight, Nell came in a bit after sinrise and stayed the day. Here she is about 4:30 PM (DSLR at 500mm):
Nell
01/09/2108 Continuing report for today, it's raining for the first time this season (that normally starts in October!). The box has a tin roof, which means it's very noisy, and clearly Nell doesn't like it but is putting up with it. To make matters worse, sometimes large drops fall from the trees above, making it even louder. Anyway, she's definitely dry!
Nell
01/09/2018 We've decided to call them Dudley and Nell. Over the past several days, Nell has been staying in the box during the day and spending only part of the night in. Dudley is making occasional visits at night for mating but little else. That's OK for now, but when she is incubating eggs and after, she'll be dependent on him to bring food. Concerning the fight video posted below, I've decided that the problem probably was that the visitor wasn't Dudley, and she wanted nothing to do with him. I have read that they are monogamous.
01/06/2018 After the pair occupied the box during daylight hours for six days running, they're not in today, having left around sunrise. The female stayed in much of the night making the rasping call that sounds like frustration, maybe hungry and expecting the male to show up with food. When he came in with nothing around 1:20 am, she let him know about it (turn on sound):


01/05/2018 Yesterday was the fifth day in a row they spent in the box, and they're both in early this morning.
01/04/2018 The pair spent the fourth day in a row in the box, then followed about the same routine as before in the early evening, coming and going. Checking videos this morning, there was only one that was in intermittently most of the night, and I was worried that we weren't going to see the other one from then on. Fortunately, the second showed up near sunrise, and they're both still in at 8:10 am as I write. Both came to the entrance to look out for a while:

One stayed there for quite a while, and I got this not-very-good shot from about 75 feet with my DSLR and 500mm lens:

The small box at left contains the external camera with not-very-neatly-dressed wires. I expect to get better DSLR shots later, but I'm very causious about approaching too closely at this stage.
01/03/2018 It's about 6:15am, and they're both in. There was a lot of action overnight with coming and going, but I didn't see any food brought in from reviewing the videos. This from last night:
Bonnie
And this morning (male behind out of sight):
Bonnie
01/02/2018 Both stayed in the box all day yesterday (Jan 1), and they're both in this morning. We're hoping she will lay eggs soon and the male gets busy with his duty of providing for the family.
Barm owls
12/31/2017 There was a lot of activity early the next morning (12/28) with mating and rats brought it, but in the end the female left. We had varying levels of activty the next two nights, but she didn't come in for the day until this morning.
12/27/2017 I'm resurecting the owl blog after a long hiatus of low activity, only occasional visits by a male who desposited a meal in the morning before light and came back after dark to retrieve it. The occasion today is that a pair whom we've been seeing over the past month has apparently moved in! They came in around 6 am, interacting a good deal (including mating). The male left at sunrise (6:50), and the female stayed, the first time we've had an owl in the box in daylight for two years. Here she is at 10:20 am with the day cam:
owl171227-1
It is now about 4 PM, and she's still in, mostly sleeping. The next test will be whether the male brings food, which is his job.
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