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Cancellation Announcements Through August 2020

March 17, 2020

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0.3 Microns. Or less.** So small you can’t see it.

In order to help keep people safer longer from Corona virus COVID-19 (also known as SARS-CoV-2 or novel coronavirus), SMBAS has officially canceled the following programs and field trips. We will continue to re-evaluate the situation. When there is no longer a risk for people gathering together, we will resume our field trips and meetings.

*Evening Program Tuesday April 7, 2020 on John James Audubon
*Evening Program Tuesday May 5, 2020 on Birds of Northeastern Brazil
Field Trip Sunday March 22, 2020 to Malibu Lagoon
Field Trip Saturday April 11, 2020 to Sycamore Canyon
Field Trip Saturday-Sunday April 25-26, 2020 to Butterbredt Spring area
Field Trip Sunday April 26, 2020 to Malibu Lagoon
BirdLA Day Saturday May 9, 2020
Field Trip Sat-Sun May 9-10, 2020 to Morongo Valley
Field Trip Sunday May 24, 2020 to Malibu Lagoon
Field Trip Saturday June 20, 2020 to Mt. Piños
Field Trip Sunday June 28, 2020 to Malibu Lagoon

*The two programs above will probably be rescheduled to the 2020-21 program season beginning October 6, 2020. We are looking into doing a ZOOM meeting, as we don’t yet know whether Santa Monica City will be making available any of their meeting facilities, or if we will want to have such meetings.

The following field trips have not yet been officially canceled:

But they may be as their dates approach. If you do not see announcements for them appearing on the blog, assume they have been cancelled. Announcements for Malibu Lagoon precede the event by three days. Announcements for other trips precede the event by ten days and three days.

Field Trip Sunday July 26, 2020 to Malibu Lagoon
Field Trip Saturday August 15, 2020 to Lower Los Angeles River
Field Trip Sunday August 27, 2020 to Malibu Lagoon

Meanwhile, here’s something you might be interested in:

** Opinions on COVID-19 (SARS-CoV-2) viral particle size differ.
The Star – 10 nanometers for corona virus in general.

National Center for Biotechnology Information article 1 – 70-90 nanometers

National Center for Biotechnology Information article 2 – 60-140 nanometers

AFP Fact Check – 60-140 nanometers (.06-.14 microns or micrometers)

N95 respirators

The New Yorker says that the N95 respirator is 95% effective in removing particles greater than 3 microns. Compare to CDC below.

The CDC says “An N95 FFR (filtering facepiece respirator) removes particles from the air that are breathed through it. They filter out at least 95% of very small (0.3 micron) particles. N95 FFRs are capable of filtering out all types of particles, including bacteria and viruses.

1 nanometer = 1 thousandth of a micron (micrometer) = 1 billionth of a meter = 0.00000004 inches
1 micron = 1 micrometer = 1 millionth of a meter = 0.00004 inches
80 nanometers = 0.08 microns =  0.0000032 inches

Therefore, if the N95 FFR filters out particles larger than 0.3 microns at 95% effectiveness, and the corona virus particle is 0.14 microns (140 nanometers) in diameter at the largest, or slightly less than 1/2 the particle size filtered by the mask, it sounds to me like these masks cannot filter out a naked & unprotected SARS-CoV-2 virus. Fortunately, the viral particle is not “naked & unprotected” but is carried on droplets or (even smaller) aerosolized droplets which are larger than 0.3 microns.

[Chuck Almdale]

3 Comments leave one →
  1. Johanna Dawes permalink
    March 18, 2020 2:41 pm

    HI Chuck,

    Thanks for your posts, I do enjoy them. RE: Morongo Valley, Something was posted recently telling how to get to your campsite, but nothing about when the bird walk/s are scheduled. Date, time. Can you send that info to me, just in case the trip goes and I can decide to be there? My choice was always to work it in with a couple of days in Big Bear but the trip timing never was right. Maybe now I can do it.

    Hope you are both well. Johanna Dawes


  2. ethanski permalink
    March 18, 2020 3:43 am

    I assume a solo birding drive to the beach w/b safe and appropriate?

    Sent from my iPhone: No puppies or trees were harmed by this e-mail……. ….have a marvelous day!



    • Chukar permalink*
      March 18, 2020 12:31 pm

      We’re not expressing any official positions on solo birding. We have to assume that everyone will get and stay informed, and make decisions that are best for themselves. It seems that the older you are, the more underlying disorders (COPD, heart disease, etc.) you may have, and the more susceptible you are to COVID-19. See the later posting on WHO data


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