Species
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MTY status & distribution
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Documentation:
if photo, usually a thumbnail;
if specimen or details,
so indicated
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Credits or comments
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Laysan Albatross
Phoebastria immutabilis
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Regular winter visitor well offshore but recent records span all
seasons
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photo © Don Roberson
26 Jan 1980 Monterey Bay
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Black-footed Albatross
Phoebastria nigripes
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Fairly common pelagic visitor offshore from winter into mid-summer;
numbers peak May-July; scarcest in fall
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photo © Don Roberson
16 May 1999 Monterey Bay
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Short-tailed Albatross
Phoebastria albatrus
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Very rare visitor offshore; records span the seasons. A century
ago this was a common visitor to Monterey Bay but the species almost went
extinct around World War II. Numbers slowly increasing and it may become
more regular here again
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photo © Robert L. Pitman
2 Dec 1983
~60 nmi SW of Cape San Martin
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Northern Fulmar
Fulmarus glacialis
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Common winter visitor offshore but numbers vary widely year-to-year.
In some years birds arrive early in fall and linger well into the following
summer
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photo © Don Roberson
10 Feb 1996 Monterey Bay
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Great-winged Petrel
Pterodroma macroptera
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Exceptional vagrant; one record (Oct 1998)
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photo © John Sorensen
18 Oct 1998 Monterey Bay
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Murphy's Petrel
Pterodroma ultima
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Likely a regular spring visitor far offshore (over 50 nmi off)
but rarely observed. At least 86 were seen in MTY waters on one research
cruise in Apr 1991 but no observers have been far offshore in spring since
then
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photo © Don Roberson
11 Apr 1991
~60 nmi W of Pt. Sur
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Mottled Petrel
Pterodroma inexpectata
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Likely a rare visitor far offshore but few observations; two inshore
records: one specimen (Nov 1996) & one sight record during gale (Dec
1984)
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no photo for MTY
but
specimen at PGMNH,
from 24 Nov 1996 Sand City,
and also a field
description
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Hawaiian Petrel
Pterodroma sandwichensis
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Rare vagrant offshore; two records in late spring (May-June). Dark-rumped
Petrel P. phaeopygia was recently split into two species: Galapagos
& Hawaiian. All evidence to date suggests MTY birds are Hawaiian Petrels;
see this i.d. page
for more details
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photo © Nancy Black
4 May 2003 Monterey Bay
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Cook's Petrel
Pterodroma cookii
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Scarce but likely regular visitor in summer far offshore; records
to date are from Apr, May, Aug, and Nov and it may be present throughout
that date span
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photo © Don Roberson
17 Nov 1979
~60 nmi SW of Pt. Sur
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Stejneger's Petrel
Pterodroma longirostris
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Very rare visitor far offshore. Only one record to date (Nov 1979)
but might be regular far offshore (over 50 nmi off) in fall
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no MTY photo
but
published descriptions &
sketch in McCaskie &
Roberson (1992)
W. Birds 23:145-152
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Bulwer's Petrel
Bulweria bulwerii
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Very rare visitor offshore; one record (July 1998) was associated
with warm waters due to an exceptional El Niño
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photo © Tristan McKee
26 July 1998 Monterey Bay
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Streaked Shearwater
Calonectris leucomelas
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Very rare fall visitor in shearwater flocks on Monterey Bay; 8
records to date (Aug-Oct)
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photo © Don Roberson
9 Oct 1977 Monterey Bay
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Cory's Shearwater
Calonectris diomedea
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Very rare fall visitor on Monterey Bay; one record (Aug 2003)
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no MTY photos
but
several descriptions, incl. this one for 23 Aug 2003
Monterey Bay
by S.F. Bailey
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Pink-footed Shearwater
Puffinus creatopus
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Common fall visitor offshore with smaller numbers sometimes present
at other seasons throughout the year
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photo © Don Roberson
11 Oct 1998 Monterey Bay
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Flesh-footed Shearwater
Puffinus carneipes
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Scarce visitor offshore, primarily in fall, but records for every
month of the year
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photo © Don Roberson
10 Feb 1996 Monterey Bay
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Greater Shearwater
Puffinus gravis
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Very rare fall & winter vagrant; there are 2 fall and 2 winter
records through 2003. Like Cory's Shearwater, this is an Atlantic species
but a few vagrants are sometimes "trapped" in the Pacific after visiting
Cape Horn in winter
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photo © Ronald L. Branson
2 Oct 1994 Monterey Bay
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Wedge-tailed Shearwater
Puffinus pacificus
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Very rare summer & fall vagrant, associated with unusual warm
waters. Three records through 2003; 2 light morph (Aug 1986, Sep 1999)
and one dark morph (Oct 1998)
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photo © Don Roberson
11 Oct 1998 Monterey Bay (dark morph)
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Buller's Shearwater
Puffinus bulleri
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Rather common fall visitor offshore (Aug-Oct); very rare in winter
or early summer. Numbers variable; some years many, some years few
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photo © Don Roberson
9 Oct 1977 Monterey Bay
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Sooty Shearwater
Puffinus griseus
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Common visitor offshore, can be abundant in dense flocks in spring
& summer (May-July). Remains common in fall but becomes scarce in winter
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photo © Don Roberson
22 Sep 1982 Monterey Bay
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Short-tailed Shearwater
Puffinus tenuirostris
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Uncommon winter visitor offshore; can be fairly common some winters
or be scarce in others; very rare in spring or summer
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photo © W. Ed Harper
Feb 1984 Monterey Bay
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Manx Shearwater
Puffinus puffinus
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Rare spring & fall migrant offshore, usually in flocks of other
shearwater; a few recorded in winter. This Atlantic species apparently
has recently colonized the north Pacific but its nesting grounds have yet
to be discovered
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photo © Rod Norden
29 Aug 1993 Monterey Bay
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Black-vented Shearwater
Puffinus opisthomelas
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Often a common fall & winter visitor to near-shore pelagic
waters but can be almost absent some years; very rare in spring or summer
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photo © Don Roberson
9 Feb 2003 Monterey Bay
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Little Shearwater
Puffinus assimilis
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Exceptional vagrant offshore; one record (Oct 2003)
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photo © Debi Shearwater
29 Oct 2003 Monterey Bay
see the
Shearwater
Journeys
website for more details
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Wilson's Storm-Petrel
Oceanites oceanicus
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Rare fall visitor to Monterey Bay, usually in flocks of other storm-petrels;
exceptional in spring
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photo © Don Roberson
3 Oct 1982 Monterey Bay
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Fork-tailed Storm-Petrel
Oceanodroma furcata
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Unpredictable visitor, usually far offshore; records span the seasons.
An occasional strong storm will blow birds into Monterey Bay and nearshore.
Recent inshore incursions were in Apr 1995, Oct 1997, May 1999
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photo © Don Roberson
25 Aug 1983 Monterey harbor
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Leach's Storm-Petrel
Oceanodroma leucorhoa
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Common summer visitor far offshore, usually well beyond the range
of single-day boat trips. Only occasionally inshore, most often in fall;
very rare in early winter
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photo © Don Roberson
9 Apr 1991
~50 nmi W of Pt. Sur
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Ashy Storm-Petrel
Oceanodroma homochroa
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Breeds very locally at Castle Rock, Big Sur coast. Otherwise, a
common fall visitor to Monterey Bay where it often forms dense roosting
rafts over the north rim of the Monterey canyon. Scarce at other seasons
offshore but records from every month
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photo © Don Roberson
3 Oct 1982 Monterey Bay
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Wedge-rumped Storm-Petrel
Oceanodroma tethys
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Very rare fall & winter visitor offshore; three records: an
on-shore specimen (Jan 1969) and two in storm-petrel flocks on Monterey
Bay (Sep-Oct 1977, Oct 1984)
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no MTY photo
but
numerous detailed
descriptions, incl.
this one for
1 Oct 1977 Monterey Bay
by D. Roberson
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Black Storm-Petrel
Oceanodroma melania
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Usually common fall visitor to Monterey Bay, often rafting with
flocks of Ashy Storm-Petrel, but in some years numbers can be small. When
present, numbers peak in early fall (Aug-Oct); rare earlier or into late
fall
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photo © Don Roberson
9 Oct 1982 Monterey Bay
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Least Storm-Petrel
Oceanodroma microsoma
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Irregular fall visitor to Monterey Bay, usually in rafts of other
storm-petrels. Can be fairly common in some very warm water years, but
may be entirely absent in other autumns
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photo © Don Roberson
9 Oct 1982 Monterey Bay
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Red-billed Tropicbird
Phaethon aethereus
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Rare summer visitor far offshore
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photo © Richard Ternullo
25 July 1993 Monterey Bay,
west of Pt. Lobos
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Red-tailed Tropicbird
Phaethon rubricauda
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Very rare late summer or fall visitor far offshore; 3 records through
2003
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photo ©
Michael Danzenbaker
9 Oct 1977 Monterey Bay
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Masked Booby
Sula dactylatra
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Very rare vagrant in summer; presence linked to warm water incursions.
Two records of adults (June 1992, Aug 1997)
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photo © Don Roberson
18 June 1992 Salinas R. mouth
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Nazca Booby
Sula granti
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Very rare vagrant in winter or spring; two records, both of juvenal
birds (Apr 1990, Feb 1999; see a discussion
on the tentative i.d. of the latter bird). Nazca Booby was only
recently split from Masked Booby and i.d. criteria in juvenal plumage is
fragmentary but molt patterns help establish i.d.
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photo © David Lemon
5 Apr 1990 ~2 nmi off Pt. Lobos
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Blue-footed Booby
Sula nebouxii
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Very rare vagrant; one record (Oct 1971) during a major incursion
of this booby to coastal California
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description only
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no MTY photo
but
several brief field descriptions
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Brown Boob
Sula leucogaster
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Rare summer or fall vagrant offshore; four confirmed records through
2003 (June-Oct) included one roosting just offshore at Castle Rocks (July
1999)
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photo © Jerry Wettle
23 Sep 1999 ~ 35 nmi
WSW of Pt. Pinos
[caught on fishing
hook & released]
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Red-footed Boob
Sula sula
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Very rare fall vagrant offshore; two records in fall 1987 coincided
with a major incursion of this booby to California coastal waters, and
included an on-shore bird
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photo © Don Roberson
3 Dec 1987 Pt. Pinos
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American White Pelican
Pelecanus erythrorhynchos
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Uncommon but often very conspicuous non-breeding visitor, now occurring
year-round at Elkhorn Slough and nearby river mouths; also regular in winter
on Lake San Antonio
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photo © Don Roberson
25 Aug 2001 Moss Landing
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Brown Pelican
Pelecanus occidentalis
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Common non-breeding visitor along the coast; numbers highest in
summer & fall, fewer in winter & spring. Formerly nested at Pt.
Lobos (last nest 1966) but could nest again in future (breeding behaviors
observed in some recent springs but no nesting yet)
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photo © Don Roberson
21 Oct 1994 Monterey Bay
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Brandt's Cormorant
Phalacrocorax penicillatrus
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Breeds widely: common resident along the rocky shoreline from Monterey
(sometimes on Coast Guard pier) and south down the Big Sur coast. Large
colony at Pt. Lobos. Forages widely inside Monterey Bay, often in large
near-shore flocks
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photo © Don Roberson
July 1977 Pacific Grove
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Double-crested Cormorant
Phalacrocorax auritus
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Breeds locally: uncommon resident breeding in local colonies on
Big Sur coast and at Elkhorn Slough reserve. Non-breeders or foragers are
widespread and conspicuous on inland lakes, at Elkhorn Slough, and at some
river mouths
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photo © Don Roberson
4 Feb 1989 Pacific Grove
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Pelagic Cormorant
Phalacrocorax pelagicus
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Breeds widely: common resident along the rocky shoreline from Monterey
(e.g., nests under buildings at Cannery Row) and south down the Big Sur
coast. Forages close to shore; does not feed in flocks
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photo © Don Roberson
30 Aug 1997 Moss Landing
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Magnificent Frigatebird
Fregata magnificens
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Very rare summer visitor offshore and sometimes along the coast;
very rare at other seasons
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photo © Daniel H. Varoujean
& L.J.V. Compagno
(from Auk 90:192)
4 Sep 1971 Moss Landing
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Great Frigatebird
Fregata minor
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Exceptional vagrant: one record of an adult male (Oct 1979)
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photo © Larry Balch
9 Oct 1977 Monterey Bay
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