Seabirds-April 2016

Card Set Information

Author:
brideout
ID:
113814
Filename:
Seabirds-April 2016
Updated:
2016-04-20 22:22:36
Tags:
Eastern Pacific Seabird ID
Folders:

Description:
ID notes
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user brideout on FreezingBlue Flashcards. What would you like to do?


  1. COOP (Mar-Sep, warm water yrs)
    Pterodroma cookii
    • Long wings, medium tail
    • Cap same gray as back
    • Can have white eyebrow
    • M weaker w/ wear
    • Mostly white underwing
    • Small carpal bar
    • Dark tips UnW
    • Small and snappy
    • Flight can be erratic
    • Breeding:
    • NZ
  2. PYPE
    Pterodroma pycrofti
    • Like COOP but:
    • Slightly smaller
    • Shorter thicker neck
    • More gray on sides of head, neck
    • Breeding:
    • E Tropical Pacific to 110o west
  3. STPE vs COOP

    • Like COOP but:
    • Darker cap
    • More contrasting above
    • Brighter blue-gray back
    • Slightly shorter, broader wings
    • Breeding:
    • Juan Fernandez Islands, Chile
  4. MOPE (Nov-Dec peak)
    Pterodroma inexpectata
    • Like COOP above but stockier
    • Dark gray belly
    • Short tail
    • Bold ulnar bar on underwing
    • Fast direct flight
    • Less acrobatic than others
    • Cooler waters
    • Breeding:
    • NZ
  5. STPE 
    Pterodroma longirostris
    • Cookilaria with dark hood
    • Narrow wings, long tail
    • White forehead
    • White notch behind eye
    • Mostly white underwing
    • Short carpal bar
    • Breeding:
    • Juan Fernandez Islands, Chile
  6. MUPE (Feb-Jun)
    Pterodroma ultima
    • Like SOSH but smaller
    • Buoyant bounding flight
    • Wings bent at carpi
    • Stocky body
    • Thick neck, small stubby bill
    • Inconspicuous M
    • Pale chin
    • Pale flash on pp below
    • Breeding:
    • South-Central Pacific
  7. HAPE (Jul-Aug)
    Pterodroma sandwichensis
    • Dark above w/ dark hood
    • Small head
    • White forehead
    • Long narrow wings
    • Long tapered tail
    • Mostly white below
    • Long thick black carpal bars
    • Less shawl than GAPE
    • White notch in shawl behind ear
    • Whiter below
    • Breeding:
    • Maui
  8. GAPE (Year-round)
    Pterodroma phaeopygia
    • Dark above w/ dark hood
    • Small head
    • Speckled forehead not unique
    • Long narrow wings
    • Long tapered tail
    • Mostly white below
    • Long thick black carpal bars
    • Axillary smudge (not diagnostic)
    • Thick trailing UnW edge
    • Deeper cap/shawl
    • Thicker bill than HAPE
    • Larger than COOP
    • Vulnerable/Critical
    • Breeding:
    • Galapagos
  9. GWPE (Year-round?)
    Pterodroma macroptera
    • Large, all dark
    • Dark underwing
    • Big head like a fulmar
    • Heavy black bill
    • Powerful flight
    • Gray face in Pacific
    • Breeding:
    • NZ
  10. JFPE (May-Aug to 200 N)
    Pterodroma externa
    • Large, Cookilaria-type
    • Darker cap/eyepatch
    • +/- White hind neck
    • Long pointed wings
    • Long tapered tail
    • Thick bill
    • Small underwing bar
    • White mottled tail base
    • Buoyant wheeling flight
    • Sub/Tropical waters
    • Breeding:
    • Juan Fernandez Is, Chile
  11. SOPE/PRPE (No records)
    Pterodroma solandri
    • Like MUPE but:
    • Longer broader wings
    • Long wedge-shaped tail
    • Thicker neck
    • Very short thick bill
    • Double wing flash below
    • +/- Silvery sheen above
    • Steadier flight than MUPE
    • Breeding:
    • Southwest Pacific
  12. PAPE (1 Oct 2005)
    Procellaria parkinsoni
    • Large and dark
    • Long-winged
    • Yellow bill plates rimmed black
    • Med wedge-shaped tail
    • Silvery pp and coverts UnW
    • Like FFSH but:
    • Toes often project
    • Black feet
    • Long pp projection on water
    • E Tropical Pacific Mar-Nov
  13. BUPE (Jul-Sep)
    Bulweria bulwerii
    • Dark, slim, long-tailed
    • Pale crescent on upperwing
    • Bat-like flight
    • Confused with storm-petrels
    • Like SRTS w/ pale upper wing
    • Breeding:
    • West and Central Pacific
  14. KEPE (Feb-Oct to 20N)
    Pterodroma neglecta
    • Thickset & polymorphic
    • Long broad wings
    • Short square tail
    • Jaeger/Skua plumage
    • White pp shafts
    • Sharp wing flash
    • White or dark belly
    • Breeding:
    • Subtropical South Pacific
  15. HEPE (Year-round to 150 N)
    Pterodroma heraldica
    • Medium sized, dimorphic
    • Lightly built
    • Narrow wings
    • Pale pp bases
    • Medium-long tail
    • Buoyant flight
    • Light and Dark morphs
    • White or dark belly
    • Breeding:
    • Tropical South Pacific
  16. TAPE (May-Nov to 200 N)
    Pseudobulweria rostrata
    • Med large, chocolate brown
    • Dark hood, white belly & vent
    • Pale pp ss bases
    • Long narrow wings
    • Long tapered tail
    • Very thick black bill
    • Languid wheeling flight
    • Wings straight and stiff
    • Albatross-like
    • Tropical waters
    • Breeding:
    • Tropical South Pacific
  17. Dimorphic Petrels
    • HEPE
    • KEPE
  18. Difficult Pairs
    • SOPE GWPE MUPE KEPE HEPE
    • COOP STPE PYPE JFPE (BULS)
    • HAPE GAPE JFPE
    • MUPE SOPE SOSH/SRTS CHSH
    • HEPE KEPE
  19. Dark Petrels
    • MUPE
    • SOPE
    • HEPE
    • KEPE dark morph
    • GWPE
    • PAPE
    • BUPE
  20. Cookilaria-like plumage
    • COOP
    • STPE
    • PYPE
    • MOPE
    • DFPE
    • JFPE
  21. Hooded Petrels
    • TAPE
    • TRPE (Trindade)
    • KEPE light morph
    • HEPE light morph
  22. Petrel Wing Flash
    • KEPE
    • SOPE/PRPE
    • HEPE
    • TAPE
  23. BLSP (Apr-Oct)
    Oceanodroma melania
    • Large, all black
    • Forked tail
    • Deep wingbeats
    • Larger & browner than ASSP
    • Fairly direct flight
    • Warmer waters, nearshore
    • Breeding:
    • Channel Is, San Benito, Gulf CA
  24. LSTP (Jul-Oct)
    Oceanodroma microsoma
    • Tiny, all dark
    • Small wedge-shaped tail
    • Looks like all wings, no tail
    • Narrow pointed wings
    • Deep jerky wingbeats
    • Somewhat erratic flight
    • Little or no gliding
    • Warm water years especially
    • Breeding:
    • San Benito & N Gulf of Calif
    • Rare N of LA waters
  25. LESP Nominate (Oct-Apr)
    Oceanodroma l. leucorhoa
    • White rump longer than wide
    • Dusky median tail stripe often
    • Erratic hanging flight, like CONI
    • Deep wingbeats
    • Forked tail hard to see
    • Usually well offshore
    • Warmer waters
    • Breeding:
    • Aleutians to Channel Is
    • Ainley's stays S of Guadalupe Is
    • ssp. cheimomnestes
  26. LESP Townsend's (Jul-Sep)
    O. leucorhoa soccoroensis
    • ssp. soccoroensis
    • Variable rump, us. intermediate
    • White rump often wraps below
    • Less median tail stripe
    • Steadier flight than nominate
    • Deep wingbeats
    • Forked tail hard to see
    • Usually well offshore
    • Warmer waters
    • Late breeder (Jun-Nov):
    • Guadalupe Is.
  27. LESP Chapman's (Jul-Sep/Yr round)
    Oceanodroma leucorhoa chapmani
    • ssp. chapmani
    • Dark rump
    • Erratic hanging flight, like CONI
    • Deep wingbeats
    • Forked tail hard to see
    • Usually far offshore
    • Warmer waters
    • Breeding:
    • Coronado & San Benito Is.
  28. WISP (Sep-Oct)
    Oceanites oceanicus
    • Flight fast & swallow-like
    • Feet project past tail
    • Square or notched tail
    • White rump wraps to vent
    • Broad wings, short arms
    • Smaller than LESP
    • Wing molt Apr-Aug in Calif
    • Breeding:
    • Antarctica & South America
  29. ASSP (Mar-Oct)
    Oceanodroma homochroa
    • Med size, dark gray
    • Long forked tail
    • Pale rump
    • Pale UnW and UpW bars
    • Large square head
    • Direct but fluttery flight
    • Deep wingbeats
    • Short glides in light winds
    • Paler back & arms
    • Here during breeding season
    • Cooler waters
    • Breeding:
    • Farallons and Channel Islands
    • Coronados and Todos Santos
    • ENDANGERED
  30. FTSP (Year round)
    Oceanodroma furcata
    • Med sized, gray
    • Flight low and direct
    • Less erratic than LESP
    • Weaving flight
    • Stiff, fluttery, shallow wingbeats
    • Short glides on arched wings
    • Pale upperwing crescents
    • Dark underwing coverts
    • Like REPH/RNPH in basic
    • Usually far offshore
    • Cooler waters
    • Mostly non-breeders here
    • Breeding:
    • Japan, Aleutians, N Calif
  31. WRSP (Jul-Oct/Yr round)
    Oceanodroma tethys
    • Small, black, broad white rump
    • Flight erratic, bat-like
    • Quick deep wingbeats
    • Heavy black bill
    • Wings angle back at carpi
    • Pale upperwing crescents
    • White rump largest of all
    • Near and offshore
    • Follows ships
    • Breeding:
    • Galapagos & Peru
  32. TRSP (Jul 2007)
    Oceanodroma tristrami
    • Very large all dark
    • Deeply forked tail
    • Bold upperwing bands
    • Variably paler gray rump patch
    • Fairly direct flight
    • Shallow wingbeats
    • Bounding in windy conditions
    • One record
    • Breeding:
    • Western subtropical Pacific
    • Matsudaira's has white pp bases
  33. RISP (Hornby's; Aug 2005)
    Oceanodroma hornbyi
    • Fairly large with forked tail
    • Black cap and chest band
    • White lores and forehead
    • Black outer wing & trailing edge
    • Gray-brown body & inner wing
    • Bold pale wing bars
    • Dark underwing, white belly
    • Unmistakable
    • Breeding:
    • Presumed Peru & Chile
  34. MASP (Apr-Oct to 17o N)
    Oceanodroma markhami
    • Large all dark
    • Paler than BLSP
    • Long pointed wings
    • Wings slightly bent at wrist
    • Long deeply forked tail
    • Buoyant flight +/- like LESP
    • Easy wingbeats
    • Long glides
    • Breeding:
    • Deserts of Peru, N. Chile
    • Humboldt Current endemic
  35. SWSP (no records)
    Oceanodroma monorhis
    • Swinhoe's
    • Medium sized all dark
    • White pp shafts
    • Wings long and blunt
    • Tail long and forked
    • Flight loping, unhurried
    • Deep wingbeats
    • Buoyant glides
    • Warm waters
    • Breeding:
    • May-Dec, Islands S. of Japan
    • New pop. in N. Atlantic
  36. BVSH (Sep-Mar mostly)
    Puffinus opisthomelas
    • Small
    • Dark brown above
    • White below
    • Fuzzy edged partial hood
    • Near threatened
    • Prefers water >57 F
    • Breeding:
    • Natividad, San Benito, Guadalupe
  37. MASH (Mar-May/Aug-Oct)
    Puffinus puffinus
    • Like BVSH but:
    • Black above
    • White undertail is key
    • Long body & wings
    • Sharp cap edge
    • White wraps around ears
    • White saddlebags
    • Breeding:
    • NE & NW Atlantic
  38. NESH (One Aug record)
    Puffinus newelli
    • Like MASH but:
    • Less heavy bodied
    • Broader wings
    • Shorter tail
    • Shorter white UnTC
    • Larger saddlebags
    • Breeding:
    • Hawaii
  39. TOSH (Nov-Jun off Baja)
    Puffinus auricularis
    • Like BVSH but:
    • Blacker above, like MASH
    • Sharper edge to dark face
    • Further offshore
    • Large white saddlebags
    • Breeding:
    • Revillagigedo Is
  40. PFSH (Apr-Oct/Yr round)
    Puffinus creatopus
    • Large with broad wings
    • Bill pinkish & dark tipped
    • Pink feet, graduated tail
    • Pale UnW coverts
    • Dark UnT coverts
    • Partial hood
    • Dark flanks on the water
    • Rare dark morph
    • Breeding:
    • Chile
    • Juan Fernanadez & Isla Mocha
  41. SOSH (Yr round/Apr-Oct)
    Puffinus griseus
    • Large
    • Narrow pointed wings
    • Wingtips curve up
    • Short tail
    • Silvery UnW coverts
    • Fast wingbeats, short glides
    • Heaviest wing loading
    • Breeding:
    • NZ, Australia, South America
  42. SRTS (Oct-Mar)
    Puffinus tenuirostris
    • Like SOSH but:
    • Small slender bill
    • Rounder head
    • Shorter tail
    • Diffuse UnW pale panel
    • +/- Pale breast & hooded look
    • Rapid swift-like wingbeats
    • More buoyant than SOSH
    • Arched wings like gadfly
    • Wingtips don't curve up
    • Breeding:
    • South Australia
  43. FFSH (Mostly Apr-May & Nov)
    Puffinus carneipes
    • Large, all dark
    • Bright pink bill
    • Like dark morph PFSH
    • Can be year round
    • Breeding:
    • SW Pacific and S Indian Ocean
  44. BULS (Jul-Sep)
    Puffinus bulleri
    • Blue-Gray w/ bold M above
    • Cap & tail darker than back
    • All white underwing
    • Long wedge-shaped tail
    • Leisurely flight
    • Often near shore
    • Breeding:
    • NZ
  45. GRSH (Aug-Apr to central Calif)
    Puffinus gravis
    • Like PFSH
    • Dark above, no M
    • Clean dark cap
    • Partial-complete white collar
    • Dark underwing edges
    • Dark ulnar bar
    • Narrow white band mid-tail
    • Straight narrow wings
    • More slender than COSH
    • White flanks on the water
    • Breeding:
    • South Atlantic
  46. WTSH (Mar-Apr/Aug-Oct)
    Puffinus pacificus
    • Dimorphic
    • Dark underwing border
    • Long pointed tail
    • Pale morph like PFSH but:
    • Less bulky
    • Larger pointier wings
    • Wings often cocked
    • Cleaner cut cap
    • Found at shelf breaks
    • Breeding:
    • Tropical Pacific
  47. CHSH (Aug-Oct to 180 N)
    Puffinus nativitatis
    • Small and all-dark
    • Size & flight like MASH
    • Flight low, quick wingbeats
    • Buoyant glides
    • Blunt wingtips
    • Medium graduated tail
    • Breeding:
    • Hawaii and Chile
  48. LISH (No records)
    Puffinus assimilis
    • Dark above like MASH
    • White below like BULS
    • Small and compact
    • White flanks & rump edges
    • White cheeks around dk eye
    • Not a long distance migrant
    • Breeding:
    • NZ, Australia, S Indian Ocean
  49. STRS (Aug-Oct to N Calif)
    Calonectris leucomelas
    • Like COSH but:
    • Scalloped above
    • Paler head
    • Gray-brown above
    • Breeding:
    • Northwest Pacific
  50. COSH (Any time)
    Calonectris diomedea
    • Large, heavy bodied
    • Lethargic flight
    • Gray-brown above
    • Indistinct M
    • Thick underwing border
    • UnW less marked than PFSH
    • Large yellow dk-tipped bill
    • White UnT coverts vs GRSH
    • White flanks on the water
    • Breeding:
    • Northeast Atlantic
  51. RHAU (Winter)
    Cerorhinca monocerata
    • Long stout yellowish bill
    • Wedge-shaped head
    • Yellow eye
    • Gray above and sides
    • White belly
    • Usually solitary
    • Alt: Plumes above & below eye
    • Juvenile has dark bill & eye
    • Breeding:
    • British Columbia to Central Calif
  52. CAAU (Year round)
    Ptychoramphus aleuticus
    • Small and chunky
    • Large head
    • White eye, white eye arc above
    • Short triangular bill
    • Dark gray overall
    • Slightly paler belly
    • Dark eye in Juv
    • Solitary or in groups
    • Mostly plankton feeder
    • Breeding:
    • British Columbia to Baja
  53. PAAU
    Aethia psittacula
    • Stocky and round-headed
    • Upturned circular orange bill
    • Broad rounded wings
    • Black above and hood
    • White belly
    • Postocular plume in alt
    • Juv has dark eye and bill
    • Breeding:
    • Alaska
  54. TUPU (Migration)
    Fratercula cirrhata
    • Alt: Side of face white
    • Yellowish rams horn plumes
    • Orange bill
    • Yellow eye
    • Black body
    • Basic: All dark
    • Slightly paler face
    • Smaller orange bill
    • Breeding:
    • Arctic Alaska to Central Calif
  55. HOPU (Feb 1914; Jun 1967)
    Fratercula corniculata
    • Alt: Side of face white
    • Black throat collar
    • Bill yellow with orange tip
    • Dark eye
    • Thin postocular line
    • Vertical supraocular line
    • White below
    • Basic: Darker gray face
    • Bill with dark base, orange tip
    • Breeding:
    • Arctic Alaska to British Columbia
  56. PIGU (Feb-Sep)
    Cepphus columba
    • Alt: Black with white GC oval
    • Dark notch in oval from below
    • Bright red feet
    • Basic: White head & below
    • Grayer barred back
    • Breeding:
    • Alaska to Channel Islands
  57. COMU (Nov-May)
    Uria aalge
    • Alt: Dark brown back & head
    • White sides & below
    • Dark pp ss below
    • Dark underwing centerline
    • White neck notch in flight

    • Basic: Paler, white cheek
    • Drooping postocular line
    • Streaked sides
    • Dark shoulder
    • Breeding:
    • Alaskan coast
  58. TBMU
    Uria lomvia
    • Alt: Like COMU but:
    • Black vs brown above
    • White gape line
    • Thicker shorter bill
    • No dark center on underwing
    • Breeding:
    • Circumpolar along coastlines
  59. BRBO (May-Oct)
    Sula leucogaster
    • Ad: Dark to gray head
    • Dark above
    • White below
    • Dark wingtips
    • Yellow feet & bill
    • F: Yellow facial skin
    • M: Blue facial skin
    • Juv: All dark brown
    • +/- pale axillaries
    • Dark belly
    • Breeding:
    • W Mexico, Gulf of California
  60. BFBO (Mar-Nov)
    Sula nebouxii
    • Ad: Pale head, gray bill
    • White scalloping on back
    • White patch neck, back, rump
    • Pale belly & axillaries
    • Mostly dark underwing
    • Juv: Dark above with white scalloping
    • Dark bill
    • Fuzzy edge to hood on chest
    • White belly
    • Mostly dark underwing
    • Pale tail above, dark below
    • Breeding:
    • W Mexico, Gulf of California
  61. RFBO (Yr round)
    Sula sula
    • Ad: All white w/ black pp, ss
    • White tt
    • Pale gray bill
    • Dark Ad: Brown w/ blk wings
    • Juv: Mostly dark
    • Pale belly
    • All dark underwing
    • Breeding:
    • Tropical Pacific
  62. NABO (Sep-Oct)
    Sula granti
    • Like MABO but in adult:
    • Orange to pink bill
    • Silver central rects
    • Shallower bill
  63. MABO (Yr round)
    Sula dactylatra
    • Ad: Like RFBO but tail black
    • Black pp, ss, and tt
    • Juv: Like BRBO Ad F
    • White collar, only pp blk
    • Pale yellow bill in all
    • Breeding:
    • Baja
  64. NOFU (Oct-May)
    Fulmarus glacialis
    • Heavy and bull-necked
    • Long, sl rounded, wings
    • Yellow bill and feet
    • Shearwater-like flight
    • Duck-like flaps, then glide
    • Wings bowed on glide
    • Pale pp bases sometimes
    • Dark, intermed, light morphs
    • Breeding:
    • Arctic
  65. RBTR Adult (Aug-Oct/Yr round)
    Phaethon aethereus
    • White below
    • Black scalloping above
    • Black leading wing edge
    • White tail streamer
    • Rapid parrot-like flaps
    • Breeding:
    • Western Mexico
  66. RBTR Juvenile (Aug-Oct/Yr round)
    Phaethon aethereus
    • More finely barred back
    • Yellow bill
    • Black pp coverts above
    • Eye-line meets across nape
    • Breeding:
    • Western Mexico
  67. RTTR Adult
    Phaethon rubricauda
    • All white, no black in pp
    • (All RBTR WTTR have black pp)
    • Black streaks on scapulars
    • Curved black eyeline
    • No black collar
    • Red bill and tail
    • Languid wingbeats
    • Breeding:
    • South Pacific, Indian Ocean
  68. RTTR Juvenile
    Phaethon rubricauda
    • Black scalloping on back
    • No black in pp
    • Curved black eyeline
    • No black collar
    • Black bill on youngest
    • Becomes yellow then red
    • Languid wingbeats
  69. SAGU Adult (Apr-Oct)
    Xema sabini
    • Gray-white-black above
    • Gray-white-gray on underwing
    • Trailing wing edge white
    • Black bill with yellow tip
    • Buoyant tern-like flight
    • Deep wing strokes
    • BLKI has shallower strokes
    • Breeding:
    • Arctic tundra
  70. SAGU Juvenile (Apr-Oct)
    Xema sabini
    • Brown body and inner wing
    • Black tail tip
  71. BOGU Adult (Oct-Mar)
    Chroicocephalus philadelphia
    • Very small
    • White outer wing edge
    • Black ear spot in basic
    • Black bill, orange legs
    • Buoyant flight, angled wings
    • Rapid wingbeats
    • Breeding:
    • Alaska and Central Canada
  72. BOGU Juv/1st Winter (Oct-Mar)
    Chroicocephalus philadelphia
    • Juvenile:
    • Dark brown carpal bar
    • Dark pp ss tips
    • Black tail tip
    • 1st Winter:
    • Darker gray body & inner wing
    • Narrow dark M above
    • Dark pp ss tips
    • Black tail tip
    • Breeding:
    • Alaska and Central Canada
  73. BLKI Adult (Oct-Mar)
    Rissa tridactyla
    • Light gray above
    • Wing tips dipped in ink
    • Black legs, yellow bill
    • Black smudgy nape in basic
    • Buoyant flight
    • Shallow wingbeats
    • Sharply angled wings
    • Breeding:
    • Alaska and Arctic
  74. BLKI Juvenile (Oct-Mar)
    Rissa tridactyla
    • Dark shoulder collar
    • Dark bill
    • Like non breeding SAGU but:
    • Black M above
    • Black tail tip band
    • Pure white underwing
    • Breeding:
    • Alaska and Arctic
  75. RLKI (no records)
    Rissa brevirostris
    • 1st winter like SAGU Basic, but:
    • Weaker collar
    • Bill shorter, thicker than BLKI
    • Dark gray pp below in basic
    • No carpal bars on juv
    • No black tail tip in juv
    • Short red legs
    • Winters in Aleutians
    • Rare from Gulf of AK to OR
    • Breeding:
    • Bering Sea
  76. LIGU (Nov-May/Yr round)
    Hydrocoloeus minutus
    • Like BOGU but:
    • Juvenile:
    • Dusky cap
    • Bold M, dark back
    • Dark ss bases
    • 1st winter
    • Big carpal bar above
    • Dusky cap
    • Dark ss bases
    • +/- pink flush below
    • Adult:
    • Dusky cap in Basic
    • Dark underwing in Alt
    • No white leading wing edge
    • Fluttery wingbeats
  77. ARTE Ad (Apr-May/Aug-Oct)
    Sterna paradisaea
    • Lighter above than COTE
    • Darker below
    • Minimal dark pp edges
    • Translucent pp panel
    • Shorter bill and neck
    • Wings farther forward
    • Wings more angular, swept back
    • Harder downstroke
    • Buoyant flight
    • Molts cap south of here
    • Longer tail
    • Tail longer than wings standing
    • Shorter legs
    • Bill red, feet orange-red
    • Breeding:
    • Canada and Alaska
  78. ARTE Juv (Apr-May/Aug-Oct)
    Sterna paradisaea
    • White UpW
    • Faint M above
    • Forehead whitish
    • Darker 1/2 cap than COTE
    • Bill mottled black-red
    • Molts south of here
  79. COTE Ad (Apr-May/Aug-Oct)
    Sterna hirundo
    • Darker above
    • Lighter below
    • Thicker dark pp edges
    • Dark pp panel on UpW
    • Longer bill and neck
    • Wings further back
    • Shorter tail
    • Tail and wings even standing
    • Molts cap in migration
    • Even up and down strokes
    • Dark carpal bar juv & basic
    • Longer legs
    • Both:
    • Bill red, feet orange-red
    • Breeding:
    • Canada and Alaska
  80. COTE Juv (Apr-May/Aug-Oct)
    Sterna hirundo
    • Dark pp UpW
    • Dark carpal bar
    • Dark tt line above
    • Dark outer rects
    • Whitish forehead
    • Bill mottled black-red
    • Molts south of here
  81. ALTE
    Onychoprion anaethetus
    • Dark gray above and below
    • White forehead
    • Black bill and legs
    • Shorter tail than ARTE/COTE
    • Dark 2o bar on underwing
    • Breeding:
    • Alaska and Aleutians
  82. SPSK (May-Nov; drop in summer)
    Stercorarius maccormicki
    • Bulky with lumbering flight
    • White pp bases above & below
    • Broad, rounded wings
    • Glides on bowed wings
    • Hunchback look
    • Heavier bill than jaegers
    • Dark and pale morphs
    • No seasonal variation
    • Breeding:
    • Antarctic
  83. MAMU (Nov-Apr)
    Brachyramphus marmoratus
    • Alt: Dark brown marbling
    • Dark underwings
    • Dark UnT coverts
    • Like ANMU but dark marbled belly

    • Basic: Like SCMU but:
    • White cheek wraps to neck
    • White scapulars & flank patch
    • Dark underwing
    • Breeding:
    • California to Alaska
  84. ANMU (Oct-Nov/Mar-Apr?)
    Synthliboramphus antiquus
    • Basic and Alt:
    • All gray back
    • Black head & chin
    • Black axillary stripe
    • White belly
    • White cheek wraps to neck
    • Bright white underwing
    • Small pale bill
    • Breeding:
    • California to Alaska
  85. KIMU
    Brachyramphus brevirostris
    • Like MAMU but:
    • Paler, more golden
    • White belly and UnT coverts
    • White outer rects
    • White above eye in Basic
    • Smaller bill
    • Juv paler face
    • Stays near glaciers
    • Breeding:
    • Alaska, Aleutians
  86. SCMU/GUMU (Feb-Jul/Aug-Dec)
    Synthliboramphus scrippsi
    S. hypoleucus
    • Dark back, flanks, sides
    • White below gape
    • Bright white underwing
    • Small dark bill
    • GUMU:
    • White in front of eye
    • Breeding:
    • Western Mexico
  87. BFAL (Mar-Jul/Year round)
    Phoebastria nigripes
    • All dark
    • Variable white around bill
    • Ad: White tail coverts
    • Dusky to dull pink bill
    • Blackish feet
    • Breeding:
    • Is S of Japan to HI
    • North to San Benedicto
  88. LAAL (Jan-May > Oct-Dec)
    Phoebastria immutabilis
    • Black back and wings
    • Black tail
    • Mostly white below
    • Juv: More underwing marks
    • Breeding:
    • Hawaii to Wake Atoll
    • Bonin Island to NW Mexico
  89. POJA Ad (Rarer in summer)
    Stercorarius pomarinus
    • Large bicolored bill
    • Dark cap extends to malar
    • Dark jagged breast-band
    • Barring on sides
    • Double wing flash below
    • 4-6 white pp shafts
    • Dark UnTC
    • Bicolored bill in dark morph too
    • Breeding:
    • Arctic
  90. PAJA Ad (Rare in summer)
    Stercorarius parasiticus
    • Slender dark bill
    • Dark cap stops at eye
    • Smooth grayish breast-band
    • Single wing flash
    • 3-5 white pp shafts
    • Breeding:
    • Arctic
  91. LTJA Ad (Mainly Sep-Oct)
    Stercorarius longicaudus
    • Short bill
    • No breastband
    • Small neat cap
    • Paler overall
    • No dark morph
    • 2-3 white pp shafts
    • No wing flash in adult
    • Tern-like flight
    • Breeding:
    • Arctic & across AK
    • Molt to breastband Nov, S of SD
  92. PAJA Juv (Rare in summer)
    Stercorarius parasiticus
    • Warm brown with rusty edges
    • Buff chevrons on outer pp tips
    • Wavy bars below except flanks
    • Fainter UnT covert bars vs POJA
    • Pale nape and malar
    • Dark cap pale neck look
    • Often pale head
    • Streaked face
    • Black-tipped gray bill
    • Most intermediate morph
    • Highest number of dark morphs
    • Short pointy central rects
  93. LTJA Juv (Mainly Sep-Oct)
    Stercorarius longicaudus
    • Much grayer
    • Very pale to very dark
    • Crisp white barring above
    • Straighter bars less scalloped
    • Creamy edges above
    • Bold neat UnTC/UnWC barring
    • Often white chest patch
    • Short blunt central rects
  94. POJA Juv (Rarer in summer)
    Stercorarius pomarinus
    • Less variation than others
    • Darker brown and duller
    • Usually dark head
    • Vague barring on underparts
    • Less wavy barring than PAJA
    • Strong UnTC barring
    • Rarer pale and dark morphs
    • Short blunt central rects
  95. Juvenile - Immature Jaegers
    • Juv cleanest marked in fall
    • Older immatures molting in fall
    • Brown to gray-brown
    • Neat pale barring above
    • Scalloping of coverts
    • Dark juv sooty all over
    • Legs pale (and in Ad LTJA)
    • Bill pale at base (and in Ad POJA)
    • B&W bars on UpT and UnT coverts
    • All have wing flashes below
  96. Shearwater Size
    • COSH, STRS
    • PFSH, GRSH, FFSH, WTSH
    • SOSH, SRTS
    • BULS
    • BVSH, MASH
  97. Storm-Petrel Size
    • TRSP
    • BLSP, MASP, FTSP
    • LESP, ASSP
    • WISP
    • LSTP, WRSP
  98. Petrel Size
    • PAPE WCPE
    • NOFU
    • KEPE
    • MUPE HAPE GAPE JFPE GWPE HEPE PRPE
    • MOPE
    • COOP STPE
    • PYPE BUPE
  99. RNPH (Mar-May, Jul-Oct)
    Phalaropus lobatus
    • Alt: Red neck, white throat
    • Black head, streaked back
    • Thin bill
    • Dark above, white pp ss bases
    • White below, dark wing edges
    • Dark carpal marks on UnW
    • Takes off straight up
    • Twisting turning flight
    • Reversed sexual dimorphism
    • Basic: White head
    • Thin eye patch
    • Gray streaked back
    • Darker than REPH
    • Breeding:
    • Arctic tundra
  100. REPH (All but Jun-Jul)
    Phalaropus fulicarius
    • Alt: Rusty body
    • Dark streaked back
    • Black head, white cheeks
    • Dark horseshoe collar
    • Mostly white underwing
    • Takes off straight up
    • Twisting turning flight
    • Reversed sexual dimorphism
    • Basic: Paler than RNPH
    • Larger and longer winged
    • Thicker bill
    • Dark carpus & wingtips above
    • Flight call higher, clearer pik
    • Breeding:
    • Arctic tundra

What would you like to do?

Home > Flashcards > Print Preview