Below is a collection of 1st cycle Thayer's Gulls photographed in central California in mid-January (2014). A week-long trip here allowed for good study of this species with some 600 individuals sighted, ~ 170 of which were first cycles. Photos sets of
2nd cycles,
3rd cycles and
adult types are also available.
Routine comparisons were made with the main confusion taxon, Glaucous-winged x Herring (so-called Cook Inlet Gull), and I've made an effort to exclude birds showing bulky proportions and bills from this set. A forthcoming post on Cook Inlet types will soon follow. I welcome any comments you might have.
bird 2 looks very borderline on the Hampton scale for Thayers, except for the primaries which look to be a 3. the primaries seem to be the easiest/most informative of all the Hampton criteria, just in terms of separating Thayers from Kumleins/Iceland if 2 or below?
ReplyDeleteHi, Andy. Yeah that 2nd bird looks a bit bleached and faded. The pale base to the bill also makes it look more "borderline". As you say, the primaries are good places to start when assessing Kumlien's/Thayer's. An open wing and tail are, needless to say, very helpful. You'd be looking for a darker secondary bar and more contrasting and dark tailband.
DeleteEverything has its value. Thanks for sharing this informative information with us. GOOD works! twin size mattress cover
ReplyDeleteI’d should check with you here. Which is not something I usually do! I take pleasure in studying a publish that may make people think. Also, thanks for permitting me to remark! EPO
ReplyDeleteI have read all the comments and suggestions posted by the visitors for this article are very fine,We will wait for your next article so only.Thanks! best mountain bike stems
ReplyDeletemattress gives each person the same amount of bed width as in a baby crib. Queen size mattresses are the commonest size but if two people are sleeping in a queen size bed each person still has 10,5 inches less bed width than if they were sleeping by themselves in a twin bed. cheap truck mattress
ReplyDeleteRestoring an old bike is a fun project and gives you a great sense of accomplishment when you finish your bicycle restore. The one step that should require the most time is the painting of your frame. Since there are a lot of steps involved and it cannot be completed at time it requires a lot of patience. bike decal
ReplyDelete