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Subject: [Oversea] Don Edwards SF Bay Refuge, Mar 2012 [Print This Page]
Author: dvmrp    Time: 10/03/2012 11:04     Subject: Don Edwards SF Bay Refuge, Mar 2012

Spent 2.5 days on the Don Edwards SF Bay Refuge, site#1. It's very easy to go, east of 101, 403 exit. There are a lot of birds, forrest birds, sea birds, etc and most important, a beautiful blue sky. There are quite a few photo and I will update in sequence.

Canada Goose


[ Last edited by dvmrp at 10/03/2012 23:35 ]
Author: dvmrp    Time: 10/03/2012 13:52

Golden-crowned Sparrow, non-breeding plumage



[ Last edited by dvmrp at 11/03/2012 08:47 ]
Author: dvmrp    Time: 10/03/2012 13:52

American Wigeon, Male



[ Last edited by dvmrp at 11/03/2012 08:48 ]
Author: dvmrp    Time: 11/03/2012 08:51

Eared Grebe, non-breeding plumage





[ Last edited by dvmrp at 11/03/2012 09:03 ]
Author: dvmrp    Time: 11/03/2012 09:55

White-tailed Kite

Author: dvmrp    Time: 11/03/2012 12:00

American Kestrel

Author: dvmrp    Time: 11/03/2012 21:50

Canada Goose, probably a male and a female?



[ Last edited by dvmrp at 11/03/2012 22:15 ]
Author: dvmrp    Time: 12/03/2012 08:13

Pied-billed Grebe

Author: dvmrp    Time: 12/03/2012 17:48

House Fince, Male, they are extremely cautious.



[ Last edited by dvmrp at 12/03/2012 17:50 ]
Author: dvmrp    Time: 12/03/2012 17:49

Bushtits, very jumpy

Author: dvmrp    Time: 12/03/2012 22:13

Turkey Vulture





[ Last edited by dvmrp at 12/03/2012 22:15 ]
Author: dvmrp    Time: 12/03/2012 23:09

Western Scrub Jay

Author: dvmrp    Time: 13/03/2012 12:13

The crimson red of Anna's Hummingbird. I was really surprise when I saw it through the viewfinder. I thought there was something wrong in my camera. I don't know if it's kind of biological effect or optical effect. Anyway, it's just amazing.











[ Last edited by dvmrp at 13/03/2012 12:28 ]
Author: tmichael    Time: 13/03/2012 20:01

I'm no physicist, but it's an optical effect in the sense that it is not produced by pigmentation, but by iridescence.

And I wish it all could be California light!

Mike Turnbull
Author: cywong    Time: 13/03/2012 20:47

Very nice photos!
Author: dvmrp    Time: 14/03/2012 10:01

According to Wiki, it's a combination of optical and biologial effect.

"Many of the Hummingbird species have bright plumage with exotic colouration. In many species, the coloring does not come from pigmentation in the feather structure, but instead from prism-like cells within the top layers of the feathers. When light hits these cells, it is split into wavelengths that reflect to the observer in varying degrees of intensity. The Hummingbird wing structure acts as a diffraction grating. The result is that, merely by shifting position, a muted-looking bird will suddenly become fiery red or vivid green. However, not all hummingbird colors are due to the prism feather structure. The rusty browns of Allen's and Rufous Hummingbirds come from pigmentation. Iridescent hummingbird colors actually result from a combination of refraction and pigmentation, since the diffraction structures themselves are made of melanin, a pigment"

http://en.wikipedia.org/wiki/Hum ... ructure_and_colours
Author: dvmrp    Time: 14/03/2012 10:01

Day#2

Bonaparte's Gull

Author: dvmrp    Time: 14/03/2012 10:02

Eared Grebe, breeding plumage



[ Last edited by dvmrp at 15/03/2012 21:59 ]
Author: dvmrp    Time: 14/03/2012 16:11

The face of eared grebe

Author: dvmrp    Time: 14/03/2012 16:12

They love diving

Author: dvmrp    Time: 15/03/2012 11:56

Lesser Yellowlegs

Author: dvmrp    Time: 15/03/2012 11:59

Black-necked Stilt

Author: dvmrp    Time: 15/03/2012 12:01

American Coot

Author: ajohn    Time: 15/03/2012 12:45

I think the bird labelled as a Lesser Yellowlegs is in fact a Least Sandpiper.

I'm enjoying the photos - please keep posting.
Author: dvmrp    Time: 16/03/2012 10:56

White-crown Sparrow

Author: dvmrp    Time: 16/03/2012 10:59

House Finch, Male

Author: dvmrp    Time: 16/03/2012 10:59

Mallard

Author: wksf    Time: 16/03/2012 23:47

Thanks for sharing the photographs, it gives me the opportunity to see these beautiful birds without leaving HK
Author: dvmrp    Time: 17/03/2012 08:57

Red tailed Hawk



Author: dvmrp    Time: 17/03/2012 08:57

Common Raven

Author: dvmrp    Time: 18/03/2012 10:57

Author: dvmrp    Time: 18/03/2012 11:01

Sqirrel was everywhere and they were running around.



Author: dvmrp    Time: 19/03/2012 10:00

I believe it's another Anna's Hummingbird in that area. The main difference is not color, but the size. It's really small.

Author: dvmrp    Time: 19/03/2012 10:01

Ruddy Duck

Author: dvmrp    Time: 19/03/2012 13:25

Day#3. My old friend in HK

Author: dvmrp    Time: 20/03/2012 10:09

California Gull?

Author: dvmrp    Time: 20/03/2012 10:11

American Avocet

Author: dvmrp    Time: 21/03/2012 07:54

Song Sparrow

Author: dvmrp    Time: 21/03/2012 07:55

Fox Sparrow

Author: dvmrp    Time: 22/03/2012 06:30

Anna's Hummingbird, Female?

Author: dvmrp    Time: 22/03/2012 06:31

Black Phoebe

Author: brendank    Time: 22/03/2012 09:21

The California Gull is actually a Herring Gull. Note the pale irides and pink feet.
Author: dvmrp    Time: 23/03/2012 07:29

Thanks for the correction.

Since I could only stay until noon in the third day, these were basically all the birds I saw in this trip. For other photos of the birds appear above, please feel free to visit. http://www.flickr.com/photos/jy-hk/sets/72157629182916526/

Quote:
Original posted by brendank at 22/03/2012 09:21
The California Gull is actually a Herring Gull. Note the pale irides and pink feet.




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