The holiday season has kept me busy for the last couple of days but I have been mulling over this post on Semipalmated Sandpipers. I have had a number of inquiries about the webbed foot on this shorebird and because that is the final characteristic for my identification of this bird, I usually try to shoot the feet. Today I am going to think out loud so to speak in an attempt to make sense of the many pictures that I have collected of the "peeps" without relying totally on the feet.
Not all Semipalmated Sandpipers are so accommodating as to put their feet out for me to see, I have been trying really hard to learn to differentiate this little "peep" from the rest. It is not so easy when the kelp-riddled shorelines are alive with little shorebirds moving about everywhere. Some are pretty easy to ID such as the Yellowlegs, Ruddy Turnstone, Black-bellied Plover and Semipalmated Plover. Although the Least Sandpiper is sometimes in the mix they are pretty easy to identify with their dark brown plumage and yellow/green legs.
That leaves me with the Semipalmated Sandpiper, White-rumped Sandpiper which does not always show its rump and the Sanderling which seems to go through quite a bit of transformation during the season. As I study my pictures of the Semipalmated Sandpiper, I have determined (right or wrong) that some of these pictures show the juvenile SP Sandpiper such as the one to the left and some adults transitioning out of breeding plumage as the one pictured below. How so, the juvenile has a darker lore than the adult winter bird. This picture was taken in late September.
The bird pictured below which I think is an adult in transition has more buff on its breast and is much darker on its back, scapular and secondaries. In addition to this, the time of the year that the picture was taken is relevant. This picture taken below was shot in late August shortly after the arrival of the shorebirds.
Identification challenges are often compounded by the day's light, the stages of molting from breeding plumage to winter plumage and the natural surroundings. The age of the bird can also affect the appearance. The one good thing is that it seems that the gender of these birds does not have significant variation.
I have found these little "peeps" often seem to pick up some of the color from the environmental surroundings and the same bird can look different depending on where it is located on the beach.
Interesting: The spellcheck wants to change "semipalmated" to "simpleminded." Maybe that is really what this post is. Nevertheless, I am in my own way trying to figure out what I need to know to be able to see these birds in their natural habitat and know which is which. While my method is not polished nor refined in any way, all new birders have to begin somewhere to develop the ability and knowledge base to be able to identify birds on the spot. Perhaps in a couple of years I will be able to report a more sophisticated analysis of the different characteristics of these three birds. It is typical of a learner who first encounters new information to try to incorporate the information into a comfortable frame of reference. Once the info is truly learned the rendition of what has been learned moves closer to that of the experts.