The Science of Birds - Random Bird Thursday: A Judgemental Songbird with a Long Tail

Episode Date: October 1, 2026

In each Random Bird Thursday (RBT) episode, the goal is to highlight a bird species that probably isn't going to get featured in a full-length podcast episode. These are birds we might overlook, even though they certainly deserve some appreciation and attention. ~~~~~~~~~~~~~~~~~⚠️ SPOILER ALERT!The featured species in this episode is the Himalayan Prinia (Prinia crinigera).Sound Citations:Rajeev Lochan, XC797143. Accessible at www.xeno-canto.org/797143.Support the show

Hello and welcome. This is the Science of Birds. I am your host, Ivan Philipson. The Science of Birds podcast is a lighthearted exploration of bird biology for lifelong learners. It's the best day of the week, and that is Random Bird Thursday. Random Bird Thursday episodes are relatively short and sweet, and what we're doing here is we are putting the spotlight on a bird's species that we won't probably cover in a full-length episode.

Lucky for us, there are over 11,000 bird species in the world, so random bird Thursday episodes give us an opportunity to celebrate maybe one of the lesser-known species. Now, in case you're wondering, I've said this before, but this is truly random. I do not pick these birds myself. I hit my random bird selector button, and whatever species pops up, that's what I talk about. with the caveat that I do reject species sometimes if I plan on doing a longer episode about that species, if I've already talked about it at length earlier, things like that.

Otherwise, it is random. I don't pick these birds. We are at the mercy of fate here. So let's go ahead and hit that button. Okay, so what we have is the Himalayan Prinia. The Himalayan Prinia and that bird has the scientific name, crinia crinidre. This is a little brown bird that lives, as you might guess, in Asia. We have our species, so let's get into it. This is a relatively small songbird, and it has a body shape typical for a songbird.

However, the first thing you're probably going to notice with this bird is that it has a very long tail. The tail is longer than the body is itself. The central tail feathers are the most elegant. They're the longest and they're relatively broad and cross their entire length. But looking at the tail in total, we see that the feathers are graduated. They're longer in the middle and they get shorter

as you move to the outside. Now, in breeding males, abrasion of the tail over the course of the breeding season eventually causes the tip of the tail to break up a bit and fray. So the tail ends up with a sort of fuzzy, shorter washed-out appearance. Now, as I said, this bird is small, but it is actually large for a prunia. It's about 6.3 inches long or 16 centimeters, and that of course includes the tail.

But there is sexual-sized dimorphism, so the male is larger. The female's body length is more like 5.7 inches or 14.4 centimeters. The bill, too, has a more or less generic song bird shape, but it is a bit short and thick relative to other pranias, but it still has a pointed tip. The bill is all black in a breeding male. However, females and non-breeding males have a brown upper mandible, so the upper beak, and it has a dark tip, and then the lower mandible is pale pinkish or yellowish. Besides the long tail, the other feature you're probably going to notice right away is that this indeed is a little brown bird. It's dark gray-brown above, and there's some black streaking on the crown and the mantle, and that contrasts with a relatively pale underside,

where there's a whitish buff belly. In the non-breeding season, males and females look relatively similar. They have a pale supercilium, so that's that white eyebrow stripe, and they have some streaking, and they're just lighter overall. But during the breeding season, the male develops a dark blackish face and his crown is darker. He doesn't have the pale supercilium and there's also some dark modeling on his breast. The iris color in the eyes of Himalayan Prinneas are pale yellowish or brown or orange or even a kind of a fleshy gray color. So kind of all over the place. And the legs and feet are pinkish or brownish pink. Pretty standard. The song is relatively simple. It has a raspy, coarse sound, and it's basically a simple phrase that's repeated

over and over again. The phrase is described as chitzerit, chitzerit, chitzerit. And it's been described as the sound of a knife or a blade being sharpened on a grindstone. Maybe not the most pleasant sound for some people, but yeah, how about you decide for yourself? Here is the sound of a singing Himalayan Prinia. This was recorded in Uttarakand, India. In terms of overall behavior, this is a relatively shy bird. It's rather skulky. Himalayan prinnias are found usually by themselves or in pairs, and they're climbing around in dense grass and shrubs. If they get spooked, if they flush, one of these prunias will fly kind of low and have a jerky movement to its flight pattern, just for a short ways and then it kind of darts back into cover.

And after that, good luck getting it out of there. You had your look and hope you got it because that bird is gone. However, sometimes these birds will get kind of curious and they'll come closer through the bushes and take a look at you, judge you. The best you can hope for is that the Himalayan Prinia gives you a thumbs up before disappearing back into the bushes. Not that it has thumbs, so, you know,

You can just tell. Let's talk about the name of this bird. Himalayan Prinia, that's pretty straightforward. It has to do with where it lives, which we'll talk a little more about in a moment. But Prinia, prinia is the genus, and that comes from a word prina in the language of Java, Javanese. And that refers to the cousin of this species that lives down there in the Indonesian archipelago, the bar-winged Prinia. So that's where the genus name came from. And then C-R-I-N-I-G-E-R-A-K-N-I-R-A-K-N-I-R-A, that comes from, I believe, Greek, and that means long-haired,

which makes sense, sort of, when you think about the long tail. The Himalayan prinia and all prinnias belong to the avian family, cysticolidi. That begins with a C, C-I-S-T-I-C-O-L-I-D-A-E, C-C-C-C-C-C-C-C-C-C-C-C-C-O-L-E. And in that family, there are 164 species. They're found in Europe, Africa, Asia, and Australasia. With any luck, I will someday do an episode entirely devoted to the family's cysticolity. In any case, there are 28 other prinia species in the genus prinia. And these are all small to medium-sized birds,

and they have long distinctly graduated or stepped tails, like the Himalayan prinia. They're generally brown or gray with some dark streaking. So within the genus prinia, who is the closest relative of our Himalayan species? It looks like it's a relative tie between the Burmese prinia, Anam prinia, and brown prinia. Now that group of birds seems to have split off from the next closest relative, which is the Chinese prinia, and that split occurred about 3.6 million years ago. during the pliocene epoch.

Now, how do we know that? We know that from molecular clock estimates derived from genetic data. There was a study conducted in 2019 by Pair Ulstrom, a professor in the Department of Ecology and Genetics at Uppsala University in Sweden. Dr. Alstrom and his colleagues published a paper in the journal Ibis all about this group of birds. And what they did was they analyzed a bunch of different types of data in the world. these birds. Their morphology, their songs, their nuclear DNA, mitochondrial DNA, their ecology, and their distributions. And they analyzed all of that data. They figured out that where there was

thought to be one species, the striated prinia, and that species, the striated prinia had the same scientific name as the bird we're talking about today, prinia, crinidre. Well, that bird, it turns out, was non-monophyletic. It wasn't really one species. It was split by that analysis into five different species, including those I just mentioned that are the closest relatives of the Himalayan Prinia. So the Himalayan Prinia was introduced to the world after the striated prina was split based on all that data in that analysis. And so that's where we first started talking about the Himalayan prina as a unique species. Where does the Himalayan prinia live. Well, of course, it lives in the Himalayas. It lives in those mountains in the foothills,

which the foothills of the Himalayas are like serious mountains for many of us in other parts of the world. So it lives from in the western end of its range in Pakistan, all the way through the foothills of the Himalayas along that downward curving arc, running through Afghanistan, Pakistan, parts of India, Nepal, Bhutan, and then down into Myanmar and Yunnan. province in China. Now within its range, it prefers to hang out in grassy hillsides and mountain sides where there are a lot of scattered bushes. It likes clearings with lots of bushes in coniferous forests. You'll find Himalayan prinneas in rocky ravines and in human-habitated areas with terraced fields on slopes with planted vegetation. And the elevational range for this habitat is about 4,000 feet.

to 7,500 feet or 1,200 to 2,300 meters. The Himalayan Prinia is not migratory. However, it is known to make seasonal altitudinal migrations, right? So it moves up in elevation during the summer, during the breeding season, and then back down to lower elevations in the winter when things get a little bit harsh at higher elevation. With regard to conservation, the Himalayan Prinia is in the least concern category, according to International Union for the Conservation of Nature. Then that is good news.

There doesn't seem to be an actual estimate for the global population size, but as far as we know, this bird is doing okay. It's pretty common across its range. It occupies that wide range of habitats I mentioned, and that those habitats also include human-modified environments, agricultural areas. I couldn't find a lot of data on what this bird eats other than the fact that it eats insects and insect larvae.

And that makes sense for this being a small songbird with the bill shape as it is. So as a Himalayan Prinia scrambles around in the shrubbery, it's picking up small insects with that bill. But it also will forage on the ground, pushing its way through dense tangles of grass, as well as low bushes. And again, it's often doing that either alone or maybe in a pear. We do know the breeding system of this bird, and that is that it's monogamous.

Both parents share in the duties of nest building, in incubation, and in taking care of the chicks. And there is some courtship. The male will perform an undulating song flight during the breeding season to impress a female. And the male will defend his territory in the breeding season by singing over and over again from an exposed perch. The breeding pair will build a nest together. and the structure of the nest is oval-shaped and domed, so it's covered, but it has a side entrance near the top. And the entire thing is made out of grass and various plant material,

and it's aligned with soft plant fibers and fine grass. The nest is positioned usually pretty close to the ground, maybe one and a half feet off the ground, or 0.5 meters, or maybe as high as 5 feet if it's in a bush, 1.5 meters. A typical clutch size is three to seven eggs, and again, both parents are going to incubate those eggs, and that time period lasts 10 to 11 days. The nests of Himalayan prinias are vulnerable to parasitism by common cuckus and plaintive cuckus, those brood parasites. And as for the biology of the Himalayan prinia, that is about what I could find, actually, that is everything I could find.

The last thing is, I can say that I have seen this. species. I saw it just once, just one bird, one individual, and that was in the country of Bhutan a couple years ago. I was at about 5,000 feet in elevation, 1,500 meters, and I checked my e-bird list from that walk that I did, and the other birds I saw were 20 russet sparrows and six yellow-brusted green finches. I'll be returning to Bhutan next year, so with any luck I'll get to see this bird again, and I'll give it some extra attention now that I've done this episode on it. So how about you? Have you had any close encounters with a Himalayan Prinia? Have you been judged by one? Thumbs up or thumbs down? If you have, if you've got a story about this species,

let me know. I would love to hear. Thank you so much for listening, for learning about this bird, and I will talk to you next time. Cheers.