01 February 2020

Monthly Notables January 2020

Sightings:
  • Little Gull (1st cycle). Riverside County, California. 01 January 2020.
  • Black-headed Gull (adult). Riverside County, California. 02 January 2020.
  • Lesser Black-backed Gull (adult). San Diego County, California. 05 January 2020.
  • Heermann's Gull (1st cycle). Palm Beach County, Florida. 06 January 2020.
    • Continuing.
  • Black-legged Kittiwake (adult). Osage County, Kansas. 06 January 2020.
  • Slaty-backed Gull (adult). Benton County, Washington. 10 January 2020.
  • Glaucous-winged Gull (adult). Salt Lake County, Utah. 11 January 2020.
  • Mew Gull (1st cycle). Nueces County, Texas. 12 January 2020.
  • California Gull (adult). Sarasota County, Florida. 12 January 2020.
  • Little Gull (adult). Davidson County, Tennessee. 12 January 2020.
  • Slaty-backed Gull (adult). San Mateo County, California. 14 January 2020.
  • Little Gull (adult). Rankin County, Mississippi. 14 January 2020.
  • Franklin's Gull (adult). Eddy County, New Mexico. 14 January 2020.
  • Laughing Gull (1st cycle). Pictou County, Nova Scotia. 16 January 2020.
  • Great Black-backed Gull (1st cycle). Boulder County, Colorado. 19 January 2020.
  • Common Gull (adult). Bristol County, Massachusetts. 20 January 2020.
    • 1st county record of this subspecies.
  • Glaucous Gull (1st cycle). Escambia County, Florida. 20 January 2020.
  • Kamchatka Gull (adult). Philadelphia County, Pennsylvania. 23 January 2020.
    • Pending acceptance. 
  • Slaty-backed Gull (adult). Monterey County, California. 23 January 2020.
  • Little Gull (2nd cycle). Caddo Parish, Louisiana. 24 January 2020.
  • California Gull (subadult). Sangamon County, Illinois. 25 January 2020.
  • Black-headed Gull (1st cycle). Lee County, Florida. 25 January 2020.
  • Great Black-backed Gull (1st cycle). Larimer County, Colorado. 26 January 2020.
    • Apparently the same individual from Boulder County. 
  • California Gull (1st cycle). Ketchikan Gateway County, Alaska. 26 January 2020.
  • Franklin's Gull (1st cycle). Orange County, California. 29 January 2020.
  • Ivory Gull (1st cycle). Lake County, Montana. 30 January 2020.
    • FIRST STATE RECORD.
  • Slaty-backed Gull (adult). Yolo County, California. 31 January 2020.

January 2020 Quiz


Aging this one is a bit trickier than usual, and should be done in conjunction with its identity. The underbody and wing linings are very adult-like, but confusing here is a largely black tail, no mirrors and a pale iris.

This species has a longer and thinner than average bill when compared to most other 4 years gulls. The upperparts, at least what we can detect from them on the upperside of the far wing, are somewhere between a Laughing Gull and pale-end Lesser Black-backed Gull.

The yellow legs and proximal-red, distal-black, bill tip pattern are very helpful to narrowing this down to Black-tailed Gull. The black tailband and uniformly broad white tips to the tail is key. No other species in North America will show this.

As for its age, the black splotches across the secondary centers and dusky under primary coverts make it fairly safe to call it a 3rd cycle type.

A complete dorsal view of this beauty:

3rd Cycle Black-tailed Gull. Choshi, Japan. December.