09 November 2015

More Thayer's & Lessers - Again

The first week of November is behind us and large gulls continue to trickle in. Between Lake County, Illinois and Berrien County, Michigan, I recorded 3 Thayer's and 7 Lesser Black-backeds this past weekend. No Great Black-backeds, nor Glaucous, nor Kumlien's Gulls.

Berrien County, Michigan. 08 November 2015.

(1) THGU. Adult. Taken during the last moments of daylight.

(2) THGU. Adult. Same individual above.

(3) LBBG. Juvenile.

(4) LBBG. Juvenile. Same individual above.

(5) LBBG. Juvenile. Same individual above.

(6) LBBG. Juvenile. Same individual above.

(7) HERG, LBBG and RBGU.

(8) LBBG & HERG.

(9) 1st cycle HERG with sparse barring on undertail.

(10) 1st cycle HERG. Same individual above.

(11) In the field, this adult HERG showed noticeable horizontal barring on the neck/breast, although it lacked the wavy pattern often seen with Glaucous-winged Gulls.

(12) Juvenile HERG.

(13) Juvenile HERG.

(14) 2nd cycle HERG.

Lake County, Illinois. 07 November 2015.

(15) A somewhat retarded 2nd cycle HERG.

(16) Same individual above.

(17) Same individual above.

(18) Same individual above.

(19) Same individual above.

(20) 1st HERG with relatively marbled greater coverts, not too unlike the 2nd cycle above.

(21) Juvenile HERG with a couple of replaced scapulars.

(22) Juvenile HERG. Open wing below.

(23) White ground color to uppertail coverts. Same individual above.

(24) 1st cycle with stress/fault bar across rectrices and remiges.

(25) Same individual above. The primaries always seem to fair better than the tail feathers when it comes to stress bars.

(26) 1st cycle HERG with about half of its scapulars replaced. Vent region sparsely marked.

(27) Same individual above.

(28) Adult type HERG with p10 still growing.

(29) 3rd cycle type HERG with p-molt complete.
(30) 3rd cycle type HERG. Flight shot below.
(31) Same individual above. The full band on p4 likely age-related.

(32) RBGU. Hatch year. Extensive brown scaling on body. Moderate wing covert and tertial renewal.

(33)  This Ring-billed has to top any hatch year RBGU that I've observed before in terms of post-juvenile feather molt. Most of the wing coverts, tertials and scapulars have been replaced here.