Birding highlights this week include a Balearic Shearwater from the Holyhead-Dublin ferry, a Ring-billed
Gull and Great White Egret at Connah's Quay nature reserve on Saturday.
Often seabirds are the victims, including Black-legged Kittiwakes (Rissa tridactyla; Montevecchi 1979, Parmelee and Parmelee 1988), Ring-billed
and Herring gulls (Larus delawarensis and L.
H13 viruses have been isolated from ring-billed
gulls (Larus delawarensis) outside the breeding season (10).
Worcester's 2012 count totaled an impressive 89 species, which were dominated by 1,741 Canada geese, 1,533 ring-billed
gulls, 1,373 black capped chickadees, 1,162 crows, 1,108 juncos, 996 robins, 881 starlings, 829 mallards, 795 house sparrows, 437 common mergansers, 401 goldfinches, 345 rock pigeons, 324 white-breasted nuthatches, 292 titmice, 274 hooded mergansers, 245 mourning doves, 236 blue jays, 196 cardinals, 196 house finches, 190 downy woodpeckers, 174 bluebirds, 138 greater scaup, 138 song sparrows, 135 redpolls, 118 common goldeneyes, 114 red-breasted nuthatches, and 100 black ducks.
They examine cultural blind spots in the case of the ring-billed
gull in Toronto, wolves, snakes, the Mormon cricket, the coyote, prairie dogs, packrats, flying carp, starlings, bugs, the cat that kills the bird, bullhead catfish, rats and mice, and the fear and loathing in nature that haunts all of us when dealing with trash animals.
gull on Llanddwyn Island on Tuesday is now classed as a Welsh rarity again; and two yellow-legged gulls were at Morfa Bychan.
And though rooftops do not seem to be much used by fall migratory birds, they are commonly frequented by resident urban species, including European starling, house sparrow, rock dove, American robin, ring-billed
gull, and American crow.
The study, by researchers from Universite de Montreal, shows that Herring and Ring-billed
gulls not only watch their neighbours; they mimic their behaviour to assure their survival.
gulls from America have been seen at Lamby Lake, Glamorgan, Penrhos on Anglesey and an adult was in the roost at Llys-y-Fran Reservoir Pembrokeshire.
However, nesting success again was low in 2004 (13 fledglings produced from 84 total nests), although we attributed most nest failures in 2004 to predation on eggs and chicks by ring-billed
gulls (Larus delawarensis).
Crows and related birds like jays, magpies, and ravens, as well as house finches, house sparrows, and ring-billed
gulls are considered likely amplifying hosts that are key, abundant sources of the virus.
It passed by direct bird-to-bird contact in four species--blue jay, American crow, black-billed magpie, and ring-billed