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California Condor
Fact Sheet
31 July 2008
Scientific Name: Gymnogyps californianus
Population low: 22 individuals in 1982
Current Population:
332
individuals
Life span: Unknown, possibly up to 60 years.
Wingspan: Up to 9.5 feet (3
meters)
Weight: Averages 16-23 pounds
Body Length: 46 to 55 inches
Range: Occurred historically
from British Columbia south to northern Baja
California and in other parts of the southwestern
United States.
Maturity: Condors reach sexual maturity and
attain adult plumage and coloration by 5-6 years of
age. Breeding is likely between 6-8 years of age.
Reproduction: One egg every other year if
nesting cycle is successful. Instead of having many
young and gambling that a few will survive, the condor
produces very few young and provides an extensive
amount of parental care. Average incubation
period for a condor egg is about 56 days.
Nest
Site: Usually in a cave on a cliff or a
crevice among boulders on a steep slope.
Young: Nestlings fledge (leave nest) full grown
at six months of age, however, historically juvenile
condors may be dependant on their parents for more
that a year. Reintroduced condors are released on
their own and must learn to forage and survive alone.
Sexes: There is no sexual dimorphism
(observable difference in size or appearance) between
males and females.
Feeding: Condors are strict scavengers. Unlike
Turkey Vultures, condors do not have an exceptional
sense of smell. They instead find their food visually,
often by investigating the activity of ravens,
coyotes, eagles, and other scavengers. Without the
guidance of their parents, young inexperienced
juvenile condors may also investigate the activity of
humans. As young condors learn and mature this human
directed curiosity diminishes.
Reasons for decline: The main reason for the
decline of the condors was an unsustainable mortality
rate of free-flying birds combined with a naturally
low reproductive rate. Most deaths in recent years
have been directly or indirectly related to human
activity. Shootings, poisoning, lead poisoning, and
collisions with power lines are considered the condors’
major threats.
Identification points to look for: Numbered wing tags, white or mottled triangle under wing,
no feathers on head, and head color black in juveniles or orange/pink in adults, not dark red as in
Turkey Vultures.
If you should encounter a condor
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Population Size and Distribution |
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31 July 2008 |
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TOTAL POPULATION |
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332 |
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CAPTIVE POPULATION |
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176 |
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Los Angeles Zoo
(includes 1 chick) |
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22 |
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San Diego WAP (includes
3 chicks) |
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28 |
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WCBP, Boise (includes 7
chicks) |
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54 |
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Oregon Zoo, Portland
(includes 2 chicks) |
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30 |
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Chapultepec Zoo, Mexico City
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2 |
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Mentor Birds in field pens
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3 |
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Pre-release birds in field pens |
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26 |
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SoCal |
3 |
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Pinnacles & Ventana |
4 |
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Baja |
4 |
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Arizona |
15 |
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Temporarily in captivity |
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11 |
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Pinnacles |
1 |
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SDWAP |
2 |
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SoCal |
2 |
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Ventana |
0 |
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Phoenix Zoo |
0 |
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Baja |
4 |
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Arizona |
2 |
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WILD POPULATION |
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156 |
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California |
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82 |
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Nestlings (chicks)
in wild nests |
8 |
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Flying, Wild-fledged
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6 |
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Flying, SoCal released birds |
29 |
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Flying, Ventana released birds |
23 |
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Flying, Pinnacles released birds |
16 |
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Baja California |
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10 |
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Nestlings (chicks) in wild nests |
0 |
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Flying, Wild-fledged |
0 |
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Flying, released birds |
10 |
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Arizona |
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64 |
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Nestlings (chicks) in wild nests |
2 |
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Flying, Wild-fledged
(342,350,389, 392,441,459) |
6 |
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Flying, released birds |
56 |
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Detailed information is available
here on each of the condors that have been released in
Arizona.
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