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Zoom Recording: Singing Feathers, Humming of Hummingbirds and the Quiet Flight of Owls and other Birds, with Dr. Christopher Clark.
The recording of this program from 6 Feb 2024 is now available online

Great Gray Owl (photo courtesy of Christopher Clark)
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Recording Glitch: There are two programs recorded here. The first (18 seconds long) is useless; click the forward button >| at lower left of screen to go past it. When the second recording appear, click the usual run button at lower left. Dr. Clark begins speaking about 20 seconds in.
Singing Feathers, Humming of Hummingbirds and the Quiet Flight of Owls and other Birds with Dr. Christopher J. Clark
Dr. Christopher J. Clark, Professor of Biology at UCR uses wind tunnels, high-speed video and other technology to study bioacoustics and biomechanics of flight and courtship. In what was originally a side project of his Ph.D., he figured out that Anna’s Hummingbirds produce loud sounds with their tail-feathers. This result was so interesting that sounds produced in flight became a major part of his research program. He will spend the first part of his presentation discussing how hummingbirds make both vocal and nonvocal sounds. Then he will pivot to discussing a more recent interest: quiet flight. Owls such as Great Gray Owl perform an especially amazing feat: they take prey such as voles that they locate by ear alone. Dr. Clark will discuss ongoing research on quiet flight, as well as unanswered questions such as: why do nightbirds (such as Common Poorwill) also have quiet flight?
Dr. Clark grew up in Seattle, received his undergraduate degree in Zoology from Washington State University in 2001, his Ph.D. from the Museum of Vertebrate Zoology at UC Berkeley in 2009, then worked in the Peabody Museum at Yale University until 2013, and has been a professor in the Evolution, Ecology, and Organismal Biology department at UC Riverside from 2013-present.

Great Gray Owl locating prey under the snow. (photo courtesy of Christopher Clark)
Golden-crowned Kinglet
[By Chuck Almdale, photos by Chuck Gates]
There are only six species in the small passerine family (of small passerines) of Regulidae (Birds of the World Family Link). Five species, including the Golden-crowned Kinglet, are in genus Regulus; Ruby-crowned is in genus Corthylio. The genus and family name “Regulus” is Latin for “little king.” The species name “satrapa” is from Greek “satrapes” for “a ruler” [yes, it’s a bit redundant]. All six species are quite small (3.75-4.5″) and all have a brightly colored crown, often concealed, which led to the allusion to “king.” The information below is adapted from Birds of the World.
We do get a few Golden-crowned Kinglets in SoCal, particularly in the higher mountain conifers, but they are vastly outnumbered by the Ruby-crowned, a species remarkable for having the largest clutch – up to 12 eggs – for its size of any North American passerine.
Photographer Chuck Gates lives in the Prineville region of Eastern Oregon, 25 miles northeast of Bend in the high desert, and has birded the area for decades. A few years ago he formed Prineville Bird Club which attracted the area’s avid birders. The four photos below – sent to me by a relative and which I thought especially nice – came from a recent trip he led over to the Pacific Coast of Southern Oregon. I’ve never seen the crest so brightly displayed. He is happy to share them with us.
Golden-crowned Kinglet Regulus satrapa: 3.25-4.25″ Photo link
Subspecies: 6
Range: So. Alaska to Newfoundland to No. Florida to No. Mexico.

Breeding: Breeds primarily north of Canadian border and the high mountain ranges extending south into the U.S., migrates for winter as far south as northeastern Mexico. Nest building begins as early as early May. Nest site probably chosen by the female, often high up in dense foliage. Nests average 3″ in diameter and may be suspended from stems, in twigs in the fork of a conifer tree or under foliage near end of a branch, height is 2-18 m, averaging 15 m. Overhanging foliage protects it from the elements and hides it from view from the side or above, but it can sometimes be partially seen from below. Clutches can be large (5-11 eggs) and most pairs lay two clutches per year. Eggs are 0.4″ x 0.5″. Eggs hatch on the same day, usually day 14-15, and the young fledge from the nest 18-19 days later.

Did you notice the feet?
Habitat: Breeds in boreal & spruce-fir forest, pines, aspens; prefers old-growth & mature forest between 250-3500m depending on region.

Diet: Arthropods, some vegetation & fruit; forages on branches, leaves, bark, mosses, lichens, also on ground. Frequently hovers and gleans in canopy from 2–10 m height.

In the not-too-distant future we’ll take a look at this small and interesting family in an installment of our Family Focus series, yet to be written.
You are all invited to the next ZOOM meeting
of Santa Monica Bay Audubon Society

Great Gray Owl (photo courtesy of Christopher Clark)
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Singing Feathers, Humming of Hummingbirds and the Quiet Flight of Owls and other Birds with Dr. Christopher J. Clark
Zoom Evening Meeting, Tuesday, 6 February, 7:30 p.m.
Zoom waiting room opens 7:15 p.m.
Dr. Christopher J. Clark, Professor of Biology at UCR uses wind tunnels, high-speed video and other technology to study bioacoustics and biomechanics of flight and courtship. In what was originally a side project of his Ph.D., he figured out that Anna’s Hummingbirds produce loud sounds with their tail-feathers. This result was so interesting that sounds produced in flight became a major part of his research program. He will spend the first part of his presentation discussing how hummingbirds make both vocal and nonvocal sounds. Then he will pivot to discussing a more recent interest: quiet flight. Owls such as Great Gray Owl perform an especially amazing feat: they take prey such as voles that they locate by ear alone. Dr. Clark will discuss ongoing research on quiet flight, as well as unanswered questions such as: why do nightbirds (such as Common Poorwill) also have quiet flight?
Dr. Clark grew up in Seattle, received his undergraduate degree in Zoology from Washington State University in 2001, his Ph.D. from the Museum of Vertebrate Zoology at UC Berkeley in 2009, then worked in the Peabody Museum at Yale University until 2013, and has been a professor in the Evolution, Ecology, and Organismal Biology department at UC Riverside from 2013-present.

Great Gray Owl locating prey under the snow. (photo courtesy of Christopher Clark)
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Breakfast at Ospreys’: Malibu Lagoon, 28 Jan. 2024
[Text by Chuck Almdale; photos by Ray Juncosa & Chris Tosdevin]

Bill length accounts for most of the size difference, and they don’t seem to be serious competitors for food.
The day started warm – 70°F at 8am – and got warmer. Of course – it’s January! Winter was over weeks ago! [Completely untrue.] The day started and stayed breezy, with gusts up to 17mph according to NOAA.
The best sighting of the day was our wintering Osprey. It had been absent in the early morning, but as we were making our way beachward from the meeting area, it flew by, scanning the channels for a breakfast fish.

It spotted one and plunged, but came up empty-taloned. It rose, flew around so more, then dove again. This time it didn’t immediately leap up out of the water. [Captioned comments below are by photographer Ray Juncosa.]

In fact, it seemed to be having a tough time just keeping its head above water.

Finally it was able to rise out of the water, hoisting a large mullet. They can lift up to 90% of their own weight. An adult Osprey weighs about 3 lbs., and I suspect this fish weighed pretty close to that. The bird looks much larger, of course, with that wingspan of 58-72,” but it’s built mostly of air. That fish is solid meat.

The Osprey is taking very deep wing strokes. It continues working hard to gain altitude.

The Great Blue Heron below made an attempt to scare the Osprey off its fish and gain a free meal for itself. It failed as the Osprey headed for the beach and the sea beyond to gain some more altitude away from the thieves in the lagoon.

Off it goes. We weren’t sure where it was heading, but I suggested that it would circle back and head for the cypress trees or its favorite electric pole at the corner of Malibu Colony where the Mockingbird used to sit and sing.

Soon it returned from seaward and landed on the pole. It seemed like 20 minutes passed before the doomed fish ran out of energy, ceased struggling, and died.

The mullet finally became still. Meanwhile the Osprey stayed on the alert for interlopers. It had been spotted by crows.


When one foot is hanging onto your fish, and the wind is gusting, and thieves are lurking, it can be hard to manipulate your meal into eating position and maintain your balance on the other. This next photo gives you the best comparison of bird to fish body size.

It now seems safe to eat breakfast. Head first, of course.

Very little is wasted. Note the talons. They’re why a fish, once caught, rarely escapes.

The discards consist of the gills and those stiff fins and tail.

On our way back from the beach, we ran into our “Parents & Kids Trip” leaders with a group of 19 girl scouts and parents, all watching the Osprey working its way through the fish. Including those 19, we had a total of 48 birders, probably a record.
We had a total of 57 species of birds, which is a hair over our average of 55.6 for 26 years worth of January censuses. Here are some of the more interesting sightings.

Their bodies and bills appear differently-sized, bu they’re both Least Sandpipers.

Royal Terns, three views. The black eye stands out from the black fringe behind it. Bill is thicker and less curved than that of the confusingly similar Elegant Tern, and has a slight gonydeal “bump” on the lower mandible, absent on the Elegant.

This Heermann’s Gull with it’s unblemished white head and black-tipped red bill is about ready to fly south to breed in the Sea of Cortez.

You rarely get this close a look at the Ring-billed to easily see the pale eye and the vertical black ring.

The Herring Gull also has a light eye and pale gray back, but has pink legs, black primaries with white “windows,” a thick yellow bill, streaking on the head, neck and (often) upper breast, and is the same size as the Western Gull. The somewhat similar California Gull is 4″ shorter, has a dark eye, a red and black gonydeal spot and when adult has greenish yellow legs.

Most of the Glaucous-winged Gulls we get in SoCal are first-winter or second-winter (like the bird below) birds. “Glaucous” means “waxy” and – in my opinion – refers to the overall oddly gray plumage of the first winter birds. It really does look like its been rubbed all over with pale candle wax. Their legs are always pink and they never have black in their primaries. The one below has worn secondary feathers, giving it a bit of a “shredded” look.

Last but not least, one of our most common winter passerines, a Yellow-rumped (Audubon’s) Warbler, which strikes me as exceptionally brightly plumaged for the middle of winter. The yellow plumage is well in, but the black breast has a way to go.

Malibu Lagoon on eBird as of 2-01-24: 7447 lists, 319 species
Most recent species added: Red-breasted Nuthatch (31 October 2023, Kyle Te Poel).
Birds new for the season: Red-tailed Hawk, Hermit Thrush, Orange-crowned Warbler. “New for the season” means its been three or more months since last seen on our trips. Only three “new” species is probably a record low. Red-tailed Hawk nests in the general area and are almost certainly always close by, but aren’t always seen. Both the Hermit Thrush and Orange-crowned Warbler were mentioned to me only by Chris Lord who often wanders off from the group, listening closely, and thus sees or hears birds the rest of us miss.
Many, many thanks to photographers: Ray Juncosa, Chris Tosdevin
Upcoming SMBAS scheduled field trips; no reservations or covid card necessary unless specifically mentioned:
- Madrona Marsh Sat Feb 10, 8:30 am.
- Malibu Lagoon, Sun. Feb 25, 8:30 (adults) & 10 am (parents & kids)
- Sepulveda Basin Sat. Mar 9, 8:00 am
- These and any other trips we announce for the foreseeable future will depend upon expected status of the Covid/flu/etc. pandemic at trip time. Any trip announced may be canceled shortly before trip date if it seems necessary. By now any other comments should be superfluous.
- Link to Programs & Field Trip schedule.
The next SMBAS Zoom program: “Aeroacoustics Lab at UCR” with Dr. Chris J. Clark, Evening Meeting, Tuesday, Feb 6, 2023, 7:30 p.m.
The SMBAS 10 a.m. Parent’s & Kids Birdwalk restarted almost a year ago on April 23. Reservations for groups (scouts, etc.) necessary, call Jean (213-522-0062); not necessary for families.
Links: Unusual birds at Malibu Lagoon
9/23/02 Aerial photo of Malibu Lagoon
More recent aerial photo
Prior checklists:
2023: Jan-June, July-Dec
2021: Jan-July, July-Dec 2022: Jan-June, July-Dec
2020: Jan-July, July-Dec 2019: Jan-June, July-Dec
2018: Jan-June, July-Dec 2017: Jan-June, July-Dec
2016: Jan-June, July-Dec 2015: Jan-May, July-Dec
2014: Jan-July, July-Dec 2013: Jan-June, July-Dec
2012: Jan-June, July-Dec 2011: Jan-June, July-Dec
2010: Jan-June, July-Dec 2009: Jan-June, July-Dec
The 10-year comparison summaries created during the Lagoon Reconfiguration Project period, remain available—despite numerous complaints—on our Lagoon Project Bird Census Page. Very briefly summarized, the results unexpectedly indicate that avian species diversification and numbers improved slightly during the restoration period June’12-June’14.
Many thanks to Femi Faminu, Chris Lord, Marie Nosurname, Chris Tosdevin and others for their contributions to this month’s checklist.
The species lists below is irregularly re-sequenced to agree with the California Bird Records Committee Official California Checklist. If part of the chart’s right side is hidden, there’s a slider button inconveniently located at the bottom of the list. The numbers 1-9 left of the species names are keyed to the nine categories of birds at the bottom.
[Chuck Almdale]
| Malibu Census 2023-24 | 8/27 | 9/24 | 10/22 | 11/26 | 12/24 | 1/28 | |
| Temperature | 69-73 | 56-74 | 62-70 | 62-68 | 53-64 | 53-64 | |
| Tide Lo/Hi Height | H+3.68 | H+3.77 | L+3.34 | H+6.53 | H+6.20 | H+5.06 | |
| Tide Time | 0832 | 0739 | 1029 | 0740 | 0644 | 1008 | |
| 1 | Canada Goose | 21 | 8 | ||||
| 1 | Cinnamon Teal | 3 | 1 | 3 | |||
| 1 | Northern Shoveler | 1 | 13 | 10 | |||
| 1 | Gadwall | 45 | 40 | 23 | 30 | 27 | 54 |
| 1 | American Wigeon | 5 | 14 | ||||
| 1 | Mallard | 20 | 12 | 9 | 8 | 7 | |
| 1 | Green-winged Teal | 1 | 31 | 8 | 17 | ||
| 1 | Lesser Scaup | 1 | |||||
| 1 | Surf Scoter | 15 | 8 | 3 | 4 | ||
| 1 | Bufflehead | 5 | 18 | 12 | |||
| 1 | Red-breasted Merganser | 20 | 5 | 4 | |||
| 1 | Ruddy Duck | 12 | 22 | 37 | 30 | ||
| 2 | Pied-billed Grebe | 2 | 1 | 4 | 6 | 2 | 2 |
| 2 | Horned Grebe | 1 | |||||
| 2 | Eared Grebe | 1 | 1 | ||||
| 2 | Western Grebe | 28 | 13 | 18 | 14 | ||
| 7 | Feral Pigeon | 3 | 4 | 3 | 4 | 4 | 4 |
| 7 | Mourning Dove | 2 | 5 | 1 | |||
| 8 | Anna’s Hummingbird | 2 | 2 | 2 | |||
| 8 | Allen’s Hummingbird | 1 | 4 | 1 | 3 | 5 | |
| 2 | Sora | 1 | |||||
| 2 | American Coot | 6 | 49 | 157 | 230 | 280 | 148 |
| 5 | Black Oystercatcher | 1 | |||||
| 5 | Black-bellied Plover | 39 | 82 | 79 | 7 | 52 | 45 |
| 5 | Killdeer | 13 | 6 | 1 | 5 | 20 | 18 |
| 5 | Semipalmated Plover | 7 | 3 | ||||
| 5 | Snowy Plover | 13 | 22 | 18 | 1 | ||
| 5 | Whimbrel | 38 | 32 | 23 | 4 | 8 | 4 |
| 5 | Long-billed Curlew | 4 | 3 | ||||
| 5 | Marbled Godwit | 1 | 48 | 45 | 5 | 11 | 5 |
| 5 | Short-billed Dowitcher | 1 | 2 | ||||
| 5 | Red-necked Phalarope | 2 | |||||
| 5 | Spotted Sandpiper | 3 | 3 | ||||
| 5 | Willet | 9 | 29 | 56 | 12 | 22 | 3 |
| 5 | Ruddy Turnstone | 2 | 4 | 10 | 1 | 10 | 5 |
| 5 | Sanderling | 2 | 32 | 27 | 69 | 10 | 7 |
| 5 | Least Sandpiper | 8 | 18 | 6 | 35 | 28 | 16 |
| 5 | Western Sandpiper | 3 | 15 | ||||
| 6 | Bonaparte’s Gull | 3 | |||||
| 6 | Heermann’s Gull | 90 | 51 | 55 | 71 | 22 | 12 |
| 6 | Ring-billed Gull | 4 | 42 | 34 | 25 | ||
| 6 | Western Gull | 85 | 65 | 45 | 68 | 64 | 30 |
| 6 | Herring Gull | 1 | 1 | 1 | 2 | ||
| 7 | Lesser Black-backed Gull | 1 | |||||
| 6 | California Gull | 3 | 7 | 7 | 220 | 425 | 270 |
| 6 | Glaucous-winged Gull | 1 | 5 | 3 | |||
| 6 | Caspian Tern | 1 | |||||
| 6 | Forster’s Tern | 1 | |||||
| 6 | Elegant Tern | 40 | 24 | 2 | 1 | ||
| 6 | Royal Tern | 10 | 4 | 5 | 12 | 7 | 3 |
| 2 | Pacific Loon | 1 | 1 | ||||
| 2 | Common Loon | 1 | |||||
| 2 | Black-vented Shearwater | 20 | 28 | ||||
| 2 | Brandt’s Cormorant | 1 | |||||
| 2 | Pelagic Cormorant | 1 | 2 | 5 | 1 | ||
| 2 | Double-crested Cormorant | 23 | 30 | 48 | 37 | 47 | 18 |
| 2 | Brown Pelican | 56 | 27 | 12 | 26 | 72 | 26 |
| 3 | Black-crowned Night-Heron | 5 | 2 | 1 | 1 | ||
| 3 | Snowy Egret | 8 | 5 | 2 | 20 | 18 | 7 |
| 3 | Green Heron | 1 | 3 | 1 | |||
| 3 | Great Egret | 5 | 6 | 4 | 2 | ||
| 3 | Great Blue Heron | 5 | 3 | 2 | 4 | 2 | 1 |
| 4 | Turkey Vulture | 1 | 2 | 2 | |||
| 4 | Osprey | 1 | 1 | 1 | 2 | 1 | 1 |
| 4 | Red-shouldered Hawk | 1 | 1 | ||||
| 4 | Red-tailed Hawk | 1 | 1 | 2 | 1 | ||
| 8 | Belted Kingfisher | 2 | 1 | 1 | 1 | ||
| 8 | Downy Woodpecker | 1 | |||||
| 8 | Nuttall’s Woodpecker | 1 | 1 | ||||
| 8 | Hairy Woodpecker | 1 | |||||
| 8 | Northern Flicker (Red-shafted) | 1 | |||||
| 4 | American Kestrel | 1 | |||||
| 4 | Peregrine Falcon | 1 | |||||
| 8 | Nanday Parakeet | 2 | |||||
| 9 | Black Phoebe | 2 | 4 | 4 | 2 | 4 | 1 |
| 9 | Say’s Phoebe | 1 | |||||
| 9 | California Scrub-Jay | 2 | 1 | 2 | |||
| 9 | American Crow | 9 | 6 | 44 | 3 | 5 | 10 |
| 9 | Common Raven | 1 | 2 | 1 | |||
| 9 | Oak Titmouse | 3 | 1 | 1 | |||
| 9 | Northern Rough-winged Swallow | 2 | |||||
| 9 | Barn Swallow | 35 | 4 | ||||
| 9 | Bushtit | 8 | 22 | 50 | 12 | ||
| 9 | Wrentit | 1 | 4 | 1 | 4 | 3 | 1 |
| 9 | Ruby-crowned Kinglet | 1 | |||||
| 9 | Blue-gray Gnatcatcher | 2 | |||||
| 9 | House Wren | 2 | 2 | 3 | 2 | ||
| 9 | Marsh Wren | 1 | |||||
| 9 | Bewick’s Wren | 1 | 1 | ||||
| 9 | European Starling | 15 | 12 | 22 | 28 | 2 | |
| 9 | Hermit Thrush | 1 | |||||
| 9 | House Finch | 5 | 6 | 5 | 6 | 9 | 12 |
| 9 | Lesser Goldfinch | 2 | 6 | ||||
| 9 | Dark-eyed Junco | 2 | |||||
| 9 | White-crowned Sparrow | 10 | 20 | 27 | 15 | ||
| 9 | Savannah Sparrow | 1 | |||||
| 9 | Song Sparrow | 4 | 5 | 5 | 6 | 7 | 10 |
| 9 | California Towhee | 3 | 1 | 2 | 1 | 1 | |
| 9 | Red-winged Blackbird | 7 | 15 | 16 | 2 | ||
| 9 | Great-tailed Grackle | 1 | 1 | 20 | 1 | ||
| 9 | Orange-crowned Warbler | 1 | 2 | 2 | |||
| 9 | Common Yellowthroat | 2 | 4 | 8 | 5 | 5 | |
| 9 | Yellow Warbler | 1 | |||||
| 9 | Yellow-rumped Warbler (Audubon’s) | 5 | 12 | 6 | 6 | ||
| 9 | Townsend’s Warbler | 1 | |||||
| 9 | Wilson’s Warbler | 1 | |||||
| 9 | Western Tanager | 1 | |||||
| 9 | Black-headed Grosbeak | 1 | |||||
| Totals by Type | Aug | Sep | Oct | Nov | Dec | Jan | |
| 1 | Waterfowl | 65 | 53 | 51 | 134 | 155 | 149 |
| 2 | Water Birds – Other | 87 | 129 | 280 | 314 | 426 | 211 |
| 3 | Herons, Egrets & Ibis | 24 | 13 | 11 | 28 | 23 | 9 |
| 4 | Quail & Raptors | 2 | 4 | 4 | 5 | 4 | 2 |
| 5 | Shorebirds | 145 | 299 | 265 | 139 | 162 | 103 |
| 6 | Gulls & Terns | 230 | 152 | 118 | 416 | 562 | 345 |
| 7 | Doves | 5 | 9 | 4 | 4 | 4 | 4 |
| 8 | Other Non-Passerines | 0 | 6 | 10 | 1 | 9 | 6 |
| 9 | Passerines | 59 | 82 | 154 | 146 | 119 | 88 |
| Totals Birds | 617 | 747 | 897 | 1187 | 1464 | 917 | |
| Total Species | Aug | Sep | Oct | Nov | Dec | Jan | |
| 1 | Waterfowl | 2 | 3 | 4 | 10 | 11 | 10 |
| 2 | Water Birds – Other | 4 | 7 | 8 | 7 | 8 | 8 |
| 3 | Herons, Egrets & Ibis | 5 | 4 | 4 | 3 | 4 | 3 |
| 4 | Quail & Raptors | 2 | 4 | 3 | 3 | 3 | 2 |
| 5 | Shorebirds | 15 | 14 | 9 | 9 | 9 | 8 |
| 6 | Gulls & Terns | 7 | 6 | 6 | 8 | 9 | 7 |
| 7 | Doves | 2 | 2 | 2 | 1 | 1 | 1 |
| 8 | Other Non-Passerines | 0 | 4 | 5 | 1 | 6 | 2 |
| 9 | Passerines | 9 | 23 | 17 | 18 | 17 | 16 |
| Totals Species – 108 | 46 | 67 | 58 | 60 | 68 | 57 |
Ancient Murrelet at Dana Point, CA | Video
[Posted by Chuck Almdale]
This video showed up today on OrangeCountyBirding@groups.io chatline. It’s actually two short videos back-to-back of the Ancient Murrelet that’s been hanging around offshore. These very cute 10″ football-shaped birds, a member of the Alcidae (auks**, murres & puffins) family, nest in Alaska, particular in the Aleutian archipelago, plus the shores of southern and peninsular Alaska. They’re rare winterers south of San Luis Obispo County and mostly well off-shore, so spotting one near-shore in Orange County is a pretty big deal (in the rarefied atmosphere of the birding community). In the winter they eat mostly crustaceans and (probably) small fish.
Dr. Joel Weintraub, who posted this video, also has a bunch of videos pertaining to birding, binoculars, telescopes, plus censusing and Ellis Island. If you feel you knowledge of these areas needs brushing up, check them out at: https://www.youtube.com/@JDWTalks
Wikipedia has a reasonably good write-up on Ancient Murrelets, which are “ancient” because of the gray shawl-like coloring of their back (think: Whistler’s mother) and the white streaks (mostly in breeding) on their head and nape.
**Auk: The word “auk” /ɔːk/ is derived from Icelandic álka and Norwegian alka or alke from Old Norse ālka from Proto-Germanic *. I can’t find any sources that say (or admit) that the word was originally onomatopoetic for its vocalizations.


