查看完整版本: Don Edwards SF Bay Refuge, Mar 2012

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
[img]http://farm8.staticflickr.com/7061/6821079178_9ce5ef0e19_b.jpg[/img]

[[i] Last edited by dvmrp at 10/03/2012 23:35 [/i]]

Golden-crowned Sparrow, non-breeding plumage

[img]http://farm8.staticflickr.com/7177/6821444802_7f5b7d24c1_b.jpg[/img]

[[i] Last edited by dvmrp at 11/03/2012 08:47 [/i]]

American Wigeon, Male

[img]http://farm8.staticflickr.com/7190/6821501610_ac4385f23c_b.jpg[/img]

[[i] Last edited by dvmrp at 11/03/2012 08:48 [/i]]

Eared Grebe, non-breeding plumage

[img]http://farm8.staticflickr.com/7052/6824816078_8009e90ea6_b.jpg[/img]

[img]http://farm8.staticflickr.com/7048/6822496230_c76be80d69_b.jpg[/img]

[[i] Last edited by dvmrp at 11/03/2012 09:03 [/i]]

White-tailed Kite

[img]http://farm8.staticflickr.com/7066/6968622167_a329cba455_b.jpg[/img]

American Kestrel

[img]http://farm8.staticflickr.com/7063/6822566264_a0da606dbb_b.jpg[/img]

Canada Goose, probably a male and a female?

[img]http://farm8.staticflickr.com/7066/6968621001_b3ab8f89d6_b.jpg[/img]

[[i] Last edited by dvmrp at 11/03/2012 22:15 [/i]]

Pied-billed Grebe

[img]http://farm8.staticflickr.com/7185/6968623635_94a854921b_b.jpg[/img]

House Fince, Male, they are extremely cautious.

[img]http://farm8.staticflickr.com/7046/6822499108_87de59e4b9_b.jpg[/img]

[[i] Last edited by dvmrp at 12/03/2012 17:50 [/i]]

Bushtits, very jumpy

[img]http://farm8.staticflickr.com/7194/6968730473_1319c2a7b9_b.jpg[/img]

Turkey Vulture

[img]http://farm8.staticflickr.com/7194/6968733379_7903774ce7_b.jpg[/img]

[img]http://farm8.staticflickr.com/7041/6822608372_8f3de9dc77_b.jpg[/img]

[[i] Last edited by dvmrp at 12/03/2012 22:15 [/i]]

Western Scrub Jay

[img]http://farm8.staticflickr.com/7062/6822607748_4014d93077_b.jpg[/img]

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.

[img]http://farm8.staticflickr.com/7203/6968778057_fb5c7a7cb4_b.jpg[/img]

[img]http://farm8.staticflickr.com/7041/6968778683_4c6591dce6_b.jpg[/img]

[img]http://farm8.staticflickr.com/7051/6968779513_10bfb8527c_b.jpg[/img]

[img]http://farm8.staticflickr.com/7056/6822656092_806dc14bf1_b.jpg[/img]

[img]http://farm8.staticflickr.com/7195/6822656908_0705dd1b23_b.jpg[/img]

[[i] Last edited by dvmrp at 13/03/2012 12:28 [/i]]

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

Very nice photos!

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"

[url]http://en.wikipedia.org/wiki/Hummingbird#Wing_structure_and_colours[/url]

Day#2

Bonaparte's Gull

[img]http://farm8.staticflickr.com/7191/6829884710_90e18a1455_b.jpg[/img]

Eared Grebe, breeding plumage

[img]http://farm8.staticflickr.com/7193/6972930103_e4a5c10270_b.jpg[/img]

[[i] Last edited by dvmrp at 15/03/2012 21:59 [/i]]

The face of eared grebe

[img]http://farm8.staticflickr.com/7056/6822280728_fe83c376c9_b.jpg[/img]

They love diving

[img]http://farm8.staticflickr.com/7057/6822288414_6e658263b8_b.jpg[/img]

Lesser Yellowlegs

[img]http://farm8.staticflickr.com/7060/6829895514_0359e898b2_b.jpg[/img]

Black-necked Stilt

[img]http://farm8.staticflickr.com/7043/6976018267_d47a5a3572_b.jpg[/img]

American Coot

[img]http://farm8.staticflickr.com/7188/6979476861_014d2a6d48_b.jpg[/img]

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

I'm enjoying the photos - please keep posting.

White-crown Sparrow

[img]http://farm8.staticflickr.com/7208/6829899918_3477bd768f_b.jpg[/img]

House Finch, Male

[img]http://farm8.staticflickr.com/7064/6829901282_7b54659f1f_b.jpg[/img]

Mallard

[img]http://farm8.staticflickr.com/7046/6968415093_b118eb55b1_b.jpg[/img]

Thanks for sharing the photographs, it gives me the opportunity to see these beautiful birds without leaving HK3551873d93aa445

Red tailed Hawk

[img]http://farm8.staticflickr.com/7194/6976030765_b7f067d7c5_b.jpg[/img]

[img]http://farm8.staticflickr.com/7069/6968417007_99c5f23aaf_b.jpg[/img]

Common Raven

[img]http://farm8.staticflickr.com/7188/6976034347_0e78dcbfd5_b.jpg[/img]

[img]http://farm8.staticflickr.com/7206/6976035613_ac81c19d51_b.jpg[/img]

Sqirrel was everywhere and they were running around.

[img]http://farm8.staticflickr.com/7191/6829914498_df4fdd2ddf_b.jpg[/img]

[img]http://farm8.staticflickr.com/7052/6976046937_4ff31122c7_b.jpg[/img]

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

[img]http://farm8.staticflickr.com/7044/6829922286_3fbdb6a932_b.jpg[/img]

Ruddy Duck

[img]http://farm8.staticflickr.com/7059/6829924414_83c530bdc5_b.jpg[/img]

Day#3. My old friend in HK

[img]http://farm8.staticflickr.com/7067/6989953721_fc3a13357b_b.jpg[/img]

California Gull?

[img]http://farm8.staticflickr.com/7186/6976059631_c89d4a2637_b.jpg[/img]

American Avocet

[img]http://farm8.staticflickr.com/7044/6830032066_c90c89edf4_b.jpg[/img]

Song Sparrow

[img]http://farm8.staticflickr.com/7201/6830034188_3849757c6c_b.jpg[/img]

Fox Sparrow

[img]http://farm8.staticflickr.com/7189/6833125050_19e2012f4d_b.jpg[/img]

Anna's Hummingbird, Female?

[img]http://farm8.staticflickr.com/7044/6833126998_5511d1d38d_b.jpg[/img]

Black Phoebe

[img]http://farm8.staticflickr.com/7039/6979254935_65fe5cd29c_b.jpg[/img]

The California Gull is actually a Herring Gull. Note the pale irides and pink feet.

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. [url]http://www.flickr.com/photos/jy-hk/sets/72157629182916526/[/url]

3551875328cc445

[quote]Original posted by [i]brendank[/i] at 22/03/2012 09:21 [url=http://www.hkbws.org.hk/BBS/redirect.php?goto=findpost&pid=47993&ptid=15988][img]http://www.hkbws.org.hk/BBS/images/common/back.gif[/img][/url]
The California Gull is actually a Herring Gull. Note the pale irides and pink feet. [/quote]