Jump to content
Whatbird Community
Sign in to follow this  
Jefferson Shank

Pacific Shorebirds along California

Recommended Posts

Here are some Pacific shorebirds along California. The pictures were taken in October. Thanks!

1. Black Oystercatcher?

a.thumb.jpg.fad25b21e5932fd787c698d329872447.jpg

2. Which gull is this? And is it possible to ID the small bird in bottom right corner?

c.thumb.JPG.0cee3c6848d497bc9e1364874572d387.JPG

3. Which gull is this? 

d.thumb.jpg.9c0a11e5321aa0b59d56ac897fc52426.jpg

4. Which gull is this? 

e.thumb.jpg.a1d8a5ec89deae8146fff4a966532b63.jpg

5. Which gull is this? 

f.thumb.jpg.9b1727e7145d7a4b838a9ccd381820d8.jpg

Share this post


Link to post
Share on other sites

The gulls are all either Western or Western x Glaucous-winged. The lighting makes definitive ID very difficult, particularly if these are all single pix of different individual birds.

  • Like 1

Share this post


Link to post
Share on other sites
 

The gulls are all either Western or Western x Glaucous-winged. The lighting makes definitive ID very difficult, particularly if these are all single pix of different individual birds.

The last 3 are of a single bird if that helps you at all.

Share this post


Link to post
Share on other sites

I think all of these have at least some Glaucous-winged in them. A Western would show a considerably darker mantle. What suggests a hybrid rather than a pure Glaucous-winged are the dark gray/blackish wingtips, although I could be wrong. 

  • Like 1

Share this post


Link to post
Share on other sites

1 is indeed Black Oystercatcher

The rest are all Glaucous-winged or Glaucous-winged x Western Gulls. Can’t really tell especially with the angle of the sun, for example photo 5 looks like pure Glaucous-winged but photo 3 looks like Glaucous-winged x Western, and those photos are of the same bird so idk

  • Like 2

Share this post


Link to post
Share on other sites

I'd say 3-5 are the same bird on the same rock. The lighting is playing tricks on you.

I am think they are Glaucous-winged x Western Gulls but the lighting is tough.

 

  • Like 3

Share this post


Link to post
Share on other sites
Posted (edited)
13 hours ago, Jefferson Shank said:

I don't know how 3 can be the same bird as 4 and 5 because 3 has a blackish tail and 4 and 5 don't. 

Maybe check the properties / metadata of these three shots.  If the times show they were taken pretty close together, odds are it's the same bird on the same rock.  I'm with @birdbrain22 on the lighting.

Either way, it isn't the tail that's dark on #3, it's the wingtips.  

Edited by Charlie Spencer
  • Like 2

Share this post


Link to post
Share on other sites
 

Maybe check the properties / metadata of these three shots.  If the times show they were taken pretty close together, odds are it's the same bird on the same rock.  I'm with @birdbrain22 on the lighting.

Either way, it isn't the tail that's dark on #3, it's the wingtips.  

I'll check when I get a chance.

And yes... I meant wingtips instead of tail.

Share this post


Link to post
Share on other sites
Posted (edited)
6 minutes ago, Jefferson Shank said:

I'll check when I get a chance.

And yes... I meant wingtips instead of tail.

"S okay, I frequently say 'Ruby-crowned Kinglet' when I really mean 'White-eyed Vireo'.  Sometimes I even say it when I really mean 'Eastern Wood-Pewee'.  Yeah, that's what I really meant to say.   :classic_blush:

Edited by Charlie Spencer
  • Haha 3

Share this post


Link to post
Share on other sites

I make the mistake of saying Ring-billed Duck.

Share this post


Link to post
Share on other sites
1 minute ago, Kevin said:

I make the mistake of saying Ring-billed Duck.

At least when I make that particular mistake, I actually have the ID correct.  If I could rename just one bird, changing 'Ring-necked' to 'Ring-billed' would be my choice.

Share this post


Link to post
Share on other sites
 

Maybe check the properties / metadata of these three shots.  If the times show they were taken pretty close together, odds are it's the same bird on the same rock. 

Times for the last 3 pictures... Seven minutes between 3 & 4 and Four minutes between 4 & 5.

  • Like 1

Share this post


Link to post
Share on other sites

The bird in picture #5 has very worn outer primaries on the left wing, but has grown a new middle primary, and it is extensively dark, thus ruling out pure GWGU. Interestingly, the bird in picture #3 has a right wing with very worn outer primaries and brand-spanking new middle primaries. Given the time of year -- when no adult four-year gulls in the northern hemisphere should be growing primaries, I'd say that the bird in pix 3-5 is the same bird. Additionally, the bird in picture #2, though the wing tips are not in focus, the looks worn and pointed, so, perhaps, all pix are of the same individual.

  • Like 1

Share this post


Link to post
Share on other sites

One bit of lexicological warning. In birding, the term "shorebird" has a specific meaning in a taxonomic sense. "Shorebirds" are those species found in various suborders of the order Charadriiformes.

https://en.wikipedia.org/wiki/Wader [Note that this Wikipedia account uses the British term "wader," despite that Brits consider shorebirds to be "short-legged waders" as opposed to the "long-legged waders" that are herons and related groups.]

The point is that the birding term "shorebird" does not encompass the Laridae, the family of gulls, terns, and skimmers. The jaegers and skuas were formerly included in the Laridae, but have recently been split into their own family (Stercorariidae). This is critical if one uses eBird.

  • Like 1

Share this post


Link to post
Share on other sites
 

The bird in picture #5 has very worn outer primaries on the left wing, but has grown a new middle primary, and it is extensively dark, thus ruling out pure GWGU. Interestingly, the bird in picture #3 has a right wing with very worn outer primaries and brand-spanking new middle primaries. Given the time of year -- when no adult four-year gulls in the northern hemisphere should be growing primaries, I'd say that the bird in pix 3-5 is the same bird. Additionally, the bird in picture #2, though the wing tips are not in focus, the looks worn and pointed, so, perhaps, all pix are of the same individual.

Then I'll mark it down as Western x Glaucous-winged Gull.

Thanks everyone for all your input!

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

×
×
  • Create New...