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Mosquitoes in L.A. County | LAist

August 12, 2022

[Posted by Chuck Almdale]

As mosquitoes are flying insects, and many birds (not enough!) catch and eat flying insects, I figure it’s valid to post this here. Plus hot news on fun viruses like West Nile, Dengue, Zika, Yellow fever and Chikungunya which your 2nd-favorite flying friends are bringing with them, to you. Keep an eye on your ankles. Encourage flycatchers to live near your house. Black Phoebes love to nest under your eaves or on your porch light.

Mosquitoes. Here’s one, the common, native Culex.
(Coutesy of Don Loarie / Creative commons via Flickr)

More Mojitos, Less Mosquitoes: How To Rid Your Home Of The Pesky Biters
LAist | Caitlin Hernández | 12 Aug 12 2022 | 5 min read

From the article:
In Southern California, mosquitoes have it made. Our continuous warmer temperatures have practically created a year-round mosquito season, which gives them more of an opportunity to grow, lay eggs, and spread diseases like West Nile virus. But as we hit the peak of summer weather, mosquito activity is rising.

Here’s the other, invasive species.

Malibu Lagoon Monthly Field Trip: Sunday, 28 August 2022

August 10, 2022

Rules for Malibu Lagoon trip are
unchanged from last month.

Results of last month’s poll:

  • Total poll recipients 54
  • Total responses 23 or 43%
  • Plurality of votes: Will come no matter what others do, will don mask if feeling unsafe, usually won’t if feeling safe.
  • My goal was to determine if dropping restrictions would frighten people away. Mostly it won’t. However, some people wanted the restrictions to remain. Out of deference to them, the same restrictions will remain in effect for the foreseeable future.

The following rules will be in effect:

  • Registration required, max. 30 people. No drop-ins, please.
  • Register to Chuck: misclists@verizon.net, not to this email or to the blog, please.
  • Masks are not required but will be appreciated.
  • Bring your Covid-19 Vaccination Record Card and a photo ID card. They will be checked. If you do not have two shots and a booster recorded on your card, you must wear a mask while you are with the group.
  • If we checked your Covid card In March-July, we won’t check it this month.
  • Bring your own binoculars; telescope too if you have one.
  • All Field Trips are designed to maximize your safety, while also enjoying birds. CDC Guidelines are followed. Participants are encouraged to observe safe distancing, and face coverings are required for those who are not fully vaccinated (2 shots + booster) for Covid-19.
  • Participation in social activities, such as field trips, comes with an inherent risk of exposure to infectious disease. Prospective participants should self-evaluate or discuss with their doctor if their participation merits this risk. If you’re sick or experiencing any symptoms that indicate you might be sick, STAY HOME.
  • The 10am Children & Parents Walk is NOT yet reinstated.
  • For general questions or help registering, contact Chuck: misclists@verizon.net
  • Additional information on our permanent Covid-19 blog page:
Late August is a reasonably good time for Baird’s Sandpipers
(Kirsten Wahlquist, both photos 8-28-16)

The migrating shorebirds are picking up in numbers and diversity as are gulls and terns. Many may still have their bright breeding plumages. Migrating Snowy Plovers are returning from breeding. And the Jumping Mullet are living up to their well-deserved reputation.

Some of the great birds we’ve had in August are: Green-winged Teal, Brandt’s & Pelagic Cormorant, Snowy Egret, White-faced Ibis, Osprey, White-tailed Kite, Red-tailed Hawk, Semipalmated Plover, Spotted Sandpiper, Ruddy & Black Turnstones, Sanderling, Western & Least Sandpipers, Pectoral Sandpiper, Short-billed Dowitcher, Least, Forster’s, Royal & Elegant Tern, Black Skimmer, White-throated Swift, Belted Kingfisher, Merlin, Western Wood-Pewee, Ash-throated Flycatcher, Western Kingbird, Oak Titmouse, House Wren,  Orange-crowned, Warbler & Wilson’s Warbler, Common Yellowthroat, Savannah, Song & Lincoln’s Sparrow, Western Tanager, Red-winged Blackbird, Bullock’s Oriole.

It will be, as as they frequently say in Malibu over a double-spiced mocha frappachino with sprinkles, served in a golden slipper: “A sege of heyrōnys!” 

Jumping (aka Black, Bully, Common, Flathead, Grey, Sea, Flathead Gray, Red, Striped and plain ol’ ordinary Mullet) Mullet. Also Goatfish. Adult commonly 16-22″ but have been recorded up to 47″ and 8 kilos (17.6 lb). In Malibu Lagoon they learn ancient piscine history in summer school, taught by a Pepperdine professor. Their preferred water temperature is 8-24°C (46-75°F), but reportedly have survived for a while in water 34.5°C (94°F) (Smartfarming)
Woe unto the unwary Mullet, for his generations shall be no more.
(Jeffrey Davidson 7-10-16)

Adult Walk 8:30 a.m., 4th Sunday of every month.  Beginner and experienced, 2-3 hours.  Species range from 35 in June to 60-75 during migrations and winter.  We move slowly and check everything as we move along.  When lagoon outlet is closed we may continue east around the lagoon to Adamson House.  We put out special effort to make our monthly Malibu Lagoon walks attractive to first-time and beginning birdwatchers.  So please, if you are at all worried about coming on a trip and embarrassing yourself because of all the experts, we remember our first trips too.  Someone showed us the birds; now it’s our turn. Bring your birding questions.

Children and Parents Walk: Still canceled due to Covid-19 pandemic, immunization and masking problems, especially with young children. Maybe in September.

Algae you can make your stand on! (Lillian Johnson 7-25-21)

Map to Meeting Place
Directions: Malibu Lagoon is at the intersection of Pacific Coast Highway and Cross Creek Road, west of Malibu Pier and the bridge.  Look around for people wearing binoculars.
Parking: Parking machine installed in the lagoon lot: 1 hr $3; 2 hrs $6; 3 hrs $9, all day $12 ($11 seniors); credit cards accepted. Annual passes accepted. You may also park (read signs carefully) on either of PCH west of Cross Creek Road, on Cross Creek Road, or on Civic Center Way north (inland) of the shopping center.  Lagoon parking in shopping center lots is not permitted (i.e. they tow cars).

Prior checklists:
2021: Jan-July
July-Dec 2022: Jan-June 
2020: Jan-JulyJuly-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

[Written & posted by Chuck Almdale]

Birds special–birds returning: Malibu Lagoon, 24 July 2022

August 6, 2022

[By Chuck Almdale]

Boot-toe island in the channel. You need an aerial view to see the boot or the toe. (L. Johnson 7-24-22)

We don’t have “July Gloom” because it doesn’t rhyme, so it’s always “June Gloom” whether it’s March or June or October. For November through February it’s “winter low clouds.” So if the sky looks gray and cloudy in our photos, it’s still “June Gloom.” Remember that. There will be a test.

Snowy Egret, feeling plumish (C. Tosdevin 7/24/22)

The clouds kept temperatures quite pleasant: 70-73°F. I suppose those on the sand, lying, trying to get a nice “healthy glow” as we used to say before our skin cracked and and flaked and fell off, leaving us scarred and saggy — they would prefer that the sun shown in the summer as it is contractually obligated to do, but those of us who know better…well, we know better. They’ll be grateful in 40 years.

Glaucous-winged Gull with wing coverts feathers worn down to the shafts. (C. Tosdevin 7/24/22)
The Winter Ramp-Summer Clock, mostly dry, but wet at the far end and the curvy part of the sidewalk was under water. Those seemingly-yellowish rectangles along the left side are the water level markers.

Speaking of things to remember, there is that weird-looking curving sidewalk that is sometimes under water and has numbers along it. It was installed about a decade ago during the 2012-13 reconfiguration of the lagoon. It’s called the “Winter Ramp-Summer Clock.” There’s been a page on our blog [we also have permanent pages, not merely blog postings] for only nine years, devoted entirely to it and detailing the construction process, so it’s understandable that you might have missed it.

It was specifically designed to be “sometimes under water” as it measures the water level in the lagoon. (It’s really tough to measure water level without something being under water at least part of the time.) I don’t know if this piece of civic architecture satisfies a great public need other than giving people something to complain about. “What idiot designed this thing? It’s under water!” I cannot say how many times I’ve heard this. No one notices the colored tile plaques marking water level. That’s partially because the paving and plaques gets covered with slimy muck (aka algae) when the water is high.

The previously wet 8-foot 0.8-inch marker tile. At the time of our visit the sidewalk was wet to the 7-foot 7.8-inch level.

The numbers then become covered with muck, and the muck is ugly and slippery and then no one in their right mind walks down the summer clock sidewalk because sometimes it’s also underwater! So, for what’s it’s worth, that’s what it’s called and that’s what it does. This will not be on the test because although I know it has a name, I can never remember what it is. Despite all the foregoing, I still think it’s kind of cool.

View of picnic area, curving summer clock sidewalk by the water. (L. Johnson 7-24-22)
Plovers: Black-bellied, Semipalmated & Western Snowy
(Left+Center: C. Tosdevin 7/24/22, Right: L. Loeher 7/29/22)

That aside, we had a few good birds today. (Of course, all these birds always think they’re good.) Species numbers jumped from our typical low month for the year – June’s 35 species – to a respectable 51 in July (see chart at bottom). Birds were returning from the north: Semipalmated Plover, Marbled Godwit, Ruddy Turnstone, Long-billed Dowitcher, Willet, Glaucous-winged Gull, Forster’s Tern.

Barn Swallow feeding frenzy (C. Tosdevin 7/24/22)

Plus a few local passerines were out and about after springtime’s busy breeding season ended: Oak Titmouse, Red-winged Blackbird, Common Yellowthroat. Barn Swallows, if they’re here, are always flying around and sitting in highly visible places. The Yellowthroats breed at the lagoon (I believe – I’ve never seen their nest, and I’d be shocked it I did – but they’re nearly always here) but we’ve missed them for the past few months.

Barn Swallow taking some “me time.” (R. Juncosa 7/24/22)

There were also a few especially good birds. Such as the Reddish Egret.

Reddish Egret (Chris Tosdevin 7/24/22)

It’s not that the the Reddish Egret (Egretta rufescens) is terrifically rare in SoCal. They’ve been around for over three decades. The first one I ever saw was in Del Mar (San Diego County) in 1986, jumping around in San Dieguito Creek. If you’re used to the slow and sedate feeding style of most herons/egrets, they’re not like that at all; they jump and dance and chase fish around in the shallow water. They’re a lot of fun to watch. The only heron/egret that’s more fun to watch is the Black Heron (Egretta ardesiaca) of sub-Saharan Africa and Madagascar, which can be easily mistaken for a black umbrella some fool left standing up in the pond. (Notice that genus Egretta has both egret and heron members).

Reddish Egret, searching, searching (Chris Tosdevin 7/24/22)

But there aren’t many Reddish Egrets around and Malibu Lagoon is not at all a reliable place to look for them. I’ve birded at Malibu Lagoon since 1979 and this was the first I’ve seen here. And it was a treat. eBird records the first Reddish Egret at Malibu Lagoon on 1 May 2014, and maybe 95 sightings since then, but most of those sightings are of the same few birds, probably under half a dozen (if anyone knows how many different Reddish Egrets have been at the lagoon, let me know). Birders tend to flock to see this bird, especially if they want to see it in L.A. County. Out of the 313 (or 314, but who’s counting) species on eBird records at the lagoon, the Reddish Egret was #293 in order of date.

Reddish Egret (L – Larry Loeher, R – Grace Murayama 7/29/22)

The Reddish Egret was still there five days later, when Grace and Larry took these photos. As I said, they jump and run around and wave their wings. They do get more reddish than this bird, but mostly on the neck.

Long-billed Dowitcher, 3.5″ shorter than Willet and far less bulky (Ray Juncosa 7/24/22)

The other relatively good bird was the Long-billed Dowitcher. Now, we get them every year at the lagoon, but never in large numbers and not for very long, and this one was in especially colorful plumage, thus nice to see. We could even figure out that it was a Long-billed rather than a Short-billed Dowitcher, which can be far from simple except for birders better than me. [It’s not a “dowager,” as on Downton Abbey. The name used to be dowitchee, doewitch or dowitch, corruptions of Deutsher (German) or Duitsch (Dutch). In England it is (or used to be) called the Red-breasted Snipe. With that long straight bill, they look a lot like snipe.]

Long-billed Dowitcher (Chris Tosdevin 7/24/22)

According to Jon Dunn & Kimball Garrett’s Birds of Southern California: Status and Distribution (1981), along the SoCal coast:
Long-billed presence: Common to abundant late Aug to late Apr; fairly common late Apr to early May & late Jul to late Aug; uncommon early-to-late July; casual or rare individuals early May to early July.

Short-billed presence: Common to abundant mid-to-late Apr & mid-July to mid-Sept; fairly common mid-Mar to mid-Apr, early-to-mid May, late June to mid-July, and mid-to-late Sept; uncommon Oct thru mid-Mar & mid-Mar thru June. They also winter along the coast at a few large marshes such as San Diego Bay and Seal Beach NWS.

For our trips at Malibu Lagoon for 301 trip dates, the sightings are almost even, but the Long-billed outnumber the Short-billed:
Long-billed: 34 visits, 208 birds.
Short-billed: 29 visits, 120 birds.
Here’s a “cheat-sheet” of dowitcher characteristics. Download/print here.
Pretend that you didn’t already know which species it is, and see if you can use it to figure out.

Check the bill-tip on the right-hand bird below.

Long-billed Dowitcher (Chris Tosdevin 7/24/22)

That’s how they grab invertebrates when they shove their bill into the sand or mud. Controllable flexi-tip.

Our last “special bird” was the juvenile Yellow-crowned Night-Heron. It had been reported earlier in the week and we were on the lookout for it all morning, with two adults and six juveniles constantly shifting positions to repeatedly comb through. Finally, lurking on the shore by the Adamson House fence, disappearing and reappearing as it walked between and through the bushes overhanging the water we found it. Chris and Lu went over to see it close-up, instead of from 200 yards away, and Chris got a photo.

Juvenile Black-crowned Night Heron. From a distance we thought/hoped it was the Yellow-crowned. (C. Tosdevin 7/24/22)

No, it’s definitely not a Black-crowned, but it sure looked like one much farther away, when you could only see the top of the bill and a direct frontal view made the bill look short and we could not see the back. (Reasons, not excuses! Reasons!) The breast-streaks did look a little too reddish and wide. So it goes, as famous birder Kurt Vonnegut once wrote.

Least Sandpiper (Grace Murayama 7/29/22)
Western & Least Sandpipers – which is which? (Grace Murayama 7/29/22)

The Snowy Plovers are definitely back, hanging around the southeastern corner of the lagoon. I saw five hunkered down in little hollows in the sand; Chris Tosdevin saw thirteen, and Grace & Larry saw sixteen five days later.

Ruddy Turnstone still in bright breeding plumage. (C. Tosdevin 7/24/22)

By the way, if you see a large, older man drawing on a pad of paper in the meeting area or at the nearby picnic tables, his name is Real. If you’re polite he might show you some of his artwork. His style reminds me of the multidirectional point-of-view (that’s my term for it) work of the First Americans of the Pacific Northwest and the Inuit, blended with the somewhat similar style but far more colorful work of the Australian Aboriginal artists. (I like those artistic traditions, so I’m predisposed to like Real’s work.) He’s very good. Perhaps a local Malibu gallery might be interested in showing it. (Hint, hint.)

Pied-billed Grebe (C. Tosdevin 7/24/22)

Malibu Lagoon on eBird as of 8-04-22: 5981 lists, 313 species.
Link: https://ebird.org/hotspot/L597658
A question for those of you who use eBird: Is there some way to get sighting dates for a particular species at a particular Hot Spot – say, Reddish Egret at Malibu Lagoon? I can’t figure out how to do it. Their line graphs are useless as far as I’m concerned.

Birds new for the season: Semipalmated Plover, Marbled Godwit, Ruddy Turnstone, Long-billed Dowitcher, Willet, Glaucous-winged Gull, Forster’s Tern, Reddish Egret, Oak Titmouse, Red-winged Blackbird, Common Yellowthroat.

Malibu Lagoon on eBird as of 6-27-22: 5873 lists, 313 species

Many thanks to photographers: Lillian Johnson, Ray Juncosa, Grace Murayama, Chris Tosdevin

Snag in water is almost submerged (L. Johnson 7-24-22)

Upcoming SMBAS scheduled field trips: Our next trip will be Malibu Lagoon on August 28. This, and any other trip we announce for the foreseeable future will be dependent upon the expected status of the Covid 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.

The next SMBAS program: Zoom Evening Meeting, Tuesday, 4 October 2022, 7:30 p.m. We will continue to Zoom our programs for a while.

The SMBAS 10 a.m. Parent’s & Kids Birdwalk is currently under discussion concerning resumption.

Osprey: “Did you bring a fish? I forgot mine.” (C. Tosdevin 7/24/22)

Links: Unusual birds at Malibu Lagoon
9/23/02 Aerial photo of Malibu Lagoon
More recent aerial photo

Prior checklists:
2021: Jan-July
July-Dec
2020: Jan-JulyJuly-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 Lillian Johnson, Chris Lord, Chris Tosdevin and others for their contributions to this month’s checklist.

The list below now includes a column on the left side with numbers 1-9, keyed to the nine categories of birds at the bottom. The species are re-sequenced to agree with the California Bird Records Committee Official California Checklist, updated 15 Jan 2022. I generally do this sequence update at the start of each year.
[Chuck Almdale]

Malibu Census 20222/273/274/245/226/267/24
Temperature61-7057-6572-7561-6665-7070-73
Tide Lo/Hi HeightH+5.76H+5.00H+4.50L-0.32H+3.33H+3.35
 Tide Time062106150442102909430909
1(Black) Brant   6  
1Canada Goose263   
1Egyptian Goose1     
1Cinnamon Teal2     
1Gadwall84726251525
1American Wigeon 612  
1Mallard123014153580
1Green-winged Teal12152   
1Surf Scoter 153   
1Bufflehead5     
1Common Goldeneye 2    
1Red-breasted Merganser65    
1Ruddy Duck41    
2Pied-billed Grebe331 12
2Eared Grebe1 1   
2Western Grebe1216    
7Feral Pigeon10846817
7Band-tailed Pigeon3   1 
7Mourning Dove424 22
8Anna’s Hummingbird21 1  
8Allen’s Hummingbird333123
2American Coot73651448
5Black-bellied Plover252821 17
5Killdeer1042336
5Semipalmated Plover  15  1
5Snowy Plover1510   13
5Whimbrel282 388
5Marbled Godwit1 2  1
5Ruddy Turnstone5    3
5Sanderling 452   
5Dunlin  1   
5Least Sandpiper201050  8
5Western Sandpiper113530  1
5Long-billed Dowitcher     1
5Spotted Sandpiper  61  
5Willet862  7
5Red-necked Phalarope   1  
6Heermann’s Gull18154275
6Ring-billed Gull1751665   
6Western Gull8895579555145
6California Gull510185353333
6Herring Gull12    
6Glaucous-winged Gull586  1
6Caspian Tern1812152218
6Forster’s Tern     1
6Royal Tern235183325
6Elegant Tern 622024 475
2Red-throated Loon2     
2Pacific Loon2     
2Common Loon1     
2Brandt’s Cormorant15150  
2Pelagic Cormorant3112 2
2Double-crested Cormorant513326224662
2Brown Pelican1523686512685
3Great Blue Heron211235
3Great Egret 53243
3Snowy Egret3411212
3Reddish Egret     1
3Black-crowned Night-Heron    48
4Turkey Vulture15344 
4Osprey11  11
4Cooper’s Hawk1     
4Red-shouldered Hawk1     
4Red-tailed Hawk1     
8Belted Kingfisher111   
9Black Phoebe33 254
9Say’s Phoebe1     
9California Scrub-Jay321 13
9American Crow2064451
9Common Raven   2  
9Oak Titmouse     2
9No. Rough-winged Swallow 248 1
9Barn Swallow 48152030
9Cliff Swallow  84 3
9Bushtit4410 810
9Wrentit 2 2 1
9Blue-gray Gnatcatcher2     
9House Wren  2 11
9Northern Mockingbird 11 13
9European Starling30321  
9House Finch5156121012
9Lesser Goldfinch2 2 1 
9Dark-eyed Junco3     
9White-crowned Sparrow25202   
9Song Sparrow61071042
9California Towhee22221 
9Red-winged Blackbird2 1  6
9Brown-headed Cowbird  21  
9Great-tailed Grackle352166
9Common Yellowthroat11   2
9Yellow-rumped Warbler61    
Totals by TypeFebMarAprMayJunJul
1Waterfowl52127494850105
2Water Birds – Other16414699143177159
3Herons, Egrets & Ibis510551329
4Quail & Raptors563451
5Shorebirds9714611466146
6Gulls & Terns783363428174110673
7Doves1710861119
8Other Non-Passerines654223
9Passerines1188164646387
 Totals Birds12478947744524371222
        
 Total SpeciesFebMarAprMayJunJul
1Waterfowl996422
2Water Birds – Other1177545
3Herons, Egrets & Ibis233345
4Quail & Raptors521121
5Shorebirds98114211
6Gulls & Terns898658
7Doves322132
8Other Non-Passerines332211
9Passerines171617131216
Totals Species – 91675957393551

Birds & Dinosaurs – Joined at the Hip | Yale News

August 4, 2022

[Posted by Chuck Almdale, suggested by Edna Alvarez]

More evidence that those friendly feathered animals living around, above, even below us, are the direct descendants of those toothy cold-blooded killers who used to rule the world (not counting bacteria).

Embryonic quail hindquarters imaged using laser scanning confocal microscopy. The skeleton is in green, nerves are in blue, and muscles are in red. The pelvis of this quail embryo has just transformed into a relatively “modern” bird configuration. (Credit: Christopher T. Griffin and Bhart-Anjan S. Bhullar)

Birds & Dinosaurs — Joined at the Hip
Yale News | Jim Shelton | July 27, 2022 | 5 minute read

From the article:

All baby birds have a moment prior to hatching when their hip bone is a tiny replica of a dinosaur’s pelvis. That’s one of the findings in a new, Yale-led study in the journal Nature that explores the evolutionary underpinnings of the avian hip bone. It is also a modern-day nod to the dramatic transformation that led from dinosaurs to birds over tens of millions of years.

Link to list of publications by co-author and lab director Bhart-Anjan S. Bhullar
Sample title: The early origin of a birdlike inner ear and the evolution of dinosaurian movement and vocalization. Science 372(6542): 601-609. Hanson M*, Hoffman EA, Norell MA, Bhullar B-AS. (2021).

Link to the paper: The developing bird pelvis passes through ancestral dinosaurian conditions
Abstract:

Living birds (Aves) have bodies substantially modified from the ancestral reptilian condition. The avian pelvis in particular experienced major changes during the transition from early archosaurs to living birds. This stepwise transformation is well documented by an excellent fossil record; however, the ontogenetic alterations that underly it are less well understood. We used embryological imaging techniques to examine the morphogenesis of avian pelvic tissues in three dimensions, allowing direct comparison with the fossil record. Many ancestral dinosaurian features (for example, a forward-facing pubis, short ilium and pubic ‘boot’) are transiently present in the early morphogenesis of birds and arrive at their typical ‘avian’ form after transitioning through a prenatal developmental sequence that mirrors the phylogenetic sequence of character acquisition. We demonstrate quantitatively that avian pelvic ontogeny parallels the non-avian dinosaur-to-bird transition and provide evidence for phenotypic covariance within the pelvis that is conserved across Archosauria. The presence of ancestral states in avian embryos may stem from this conserved covariant relationship. In sum, our data provide evidence that the avian pelvis, whose early development has been little studied, evolved through terminal addition—a mechanism whereby new apomorphic states are added to the end of a developmental sequence, resulting in expression of ancestral character states earlier in that sequence. The phenotypic integration we detected suggests a previously unrecognized mechanism for terminal addition and hints that retention of ancestral states in development is common during evolutionary transitions.

Three more articles on this paper: Xeniasday, Wiley Analytical Science, Hartford Courant.

Malibu Lagoon trip is a go, slight rule change: Sunday, 24 July 2022

July 18, 2022

Link to prior announcement here.

Suggestions:

  • Bring your mask. You may want to wear it at least during the first 30-45 minutes when the group is a bit compact and crowded. Covid-19 BA.5 variant – the most infectious variant to date (cue Jaws music) – is on the rise, L.A. County has the highest rate in the nation (or so I’ve recently read in the L.A. Times) and L.A. County will probably soon institute mandatory indoor mask mandate.
  • If you feel sick, stay home and isolate.
  • If you have been around anyone who has tested positive for Covid-19, or who is experiencing Covid-19 symptoms, please be considerate of others, and stay home.

High temperature predictions: 70°, 73°, 74°, 74°, 93° (whaaaat?).
(Middlin’) high tide of 3.35 ft. is at 9:09 am!
Dilly-dallying / shilly-shallying? We still have a few openings.

To reiterate a few rules:

  • If I checked your Covid card last month, I won’t check it again.
  • For all others, bring your covid vax card. Yes, I have a list.
  • Trip has a few openings. Send me an email if you want to be on it.
  • Email to Chuck: misclists@verizon.net.
  • Masks are not required but are appreciated.
  • Temperature likely to be in mid-to-high 70’s.
  • It will be, as one birder succinctly commented last July: “A trewloue of turtuldowẏs!” 

The prior rules, still in force

  • Registration required, max. 30 people. No drop-ins, please.
  • Bring your Covid-19 Vaccination Record Card and a photo ID card. They will be checked. If you do not have two shots and a booster (preferably three boosters) recorded on your card, you must wear a mask while you are with the group.
  • If we checked your Covid card last month, we won’t check it this month.
  • Bring your own binoculars.
  • All Field Trips are designed to maximize your safety, while also enjoying birds. CDC Guidelines are followed. Participants are encouraged to observe safe distancing, and face coverings are required for those who are not fully vaccinated (2 shots + booster) for Covid-19.
  • Participation in social activities, such as field trips, comes with an inherent risk of exposure to infectious disease. Prospective participants should self-evaluate or discuss with their doctor if their participation merits this risk. If you’re sick or experiencing any symptoms that indicate you might be sick, STAY HOME.
  • The 10am Children & Parents Walk is NOT reinstated. Not yet, anyway.
  • For general questions or help registering, contact Chuck: misclists@verizon.net
  • Additional information on our permanent Covid-19 blog page:
Canada Goose keeps a steely eye on that Killdeer, a notorious sneak. (R. Juncosa 5-26-19)
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