Burrowing Owl StatisticsBurrowing Owl Statistics: Nests | Migration Distance | Productivity | Demography
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| Photo by Ray Bersabe. |
All of the data below is derived from the South Bay Burrowing Owl Demography Study. The data is provided by the Environmental Awareness Association (EAA), a Mission College student club.
The 2001 Breeding Season
at Mission College
- # Of Nest Inhabited: 8
# Of Chicks Born at Mission This Season: 22 chicks
A total of eight burrows had some activity this breeding season at Mission College. Burrowing Owl specialists for the South Bay Burrowing Owl Demography Study took all of the following observations and data. The scientists identified every individual owl and tracked they're activities from 1998 till 2001. - Nest A: Home to Athena and Ahab.
Ahab has only one leg, hence the name.
Athena was born at Mission in the year 2000 and had made it her home ever since.
This couple produced no chicks this breeding season.
- Nest B: Home to Betty and Barney.
The couple chose the artificial burrows that were built by the members of EAA in Fall, 2000.
Betty was born at Mission in 2000.
Barney was born at Tasman in 1999.
He then migrated to Mission in the year 2000 and has been here ever since.
Betty and Barney had the most chicks out of all their neighbors at Mission College. They had a total of 5 chicks. - Nest C: Home to Claudia and Chris.
Claudia is a shoreline chick born in the year 1999. She moved to Mission in 2000.
Chris was an adult at Mission in the year 1998, when the research had begun. He should be at least 4 years old.
Claudia and Chris had 2 chicks. - Nest D: Home to Diana and Darryl.
Diana was born in Sunnyvale in 1999. She fledged to Shoreline in 2000. In 2001, she made her way to Mission College.
Darryl was a Mission College chick from 2000. Darryl and Frankie are brothers.
The couple had a total of 2 chicks. - Nest E: Home to Elaine and Eddie.
Elaine was an adult at Mission in 1998. She should be at least 4 years old.
Eddie is unidentified at the moment. So, where he is from is not known.
Elaine and Eddie had 3 chicks. - Nest F: Home to Fiona and Frankie.
Fiona was an adult at Mission in year 2000. She should be more than 2 years old.
Frankie was born at Mission in 2000. Frankie and Darryl are brothers.
This couple had 4 chicks. - Nest G: Home to Gina and Glenn.
Gina was born at Mission College in 1999 where a part of the parking lot is now. She is 2 years old.
Glenn was born at Mission in 2000. Glenn is Frankie's and Darryl's half brother.
Gina and Glenn had 2 chicks. - Nest H: Home to Heidi and Hercules.
Heidi is a mysterious one. No data on her.
Hercules was found at Mission as an adult from 1998. He should be at least 4 years old. Hercules is the father of Frankie, Darryl, and Glenn.
The couple had 4 chicks.
toptop  |
| Photo by Ray Bersabe. |
Productivity Statistics
- 1998: 40% productivity
15 pair of breeding burrowing owls---6 successful pair produced 14 chicks
- 1999: 38% productivity
8 pair of breeding burrowing owls---3 successful pair produced 15 chicks
- 2000: 86% productivity
7 pair of breeding burrowing owls---6 successful pair produced 13 chicks
(only 10 chicks successfully fledged)
- 2001: 8 pair of breeding burrowing owls
top| South
Bay Burrowing Owl Demography Study |
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Burrowing Owls at Mission College
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2001 |
2000
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1999
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1998
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# of potential breeding pairs
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8 |
7
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8
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12
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# of successful pairs
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7 |
6
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3
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6
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# of chicks produced
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22 |
13
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15
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14
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productivity rate (successful pairs/potential pairs)
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88% (7/8) |
86% (6/7)
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38% (3/8)
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50% (6/12)
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# previously-banded owls identified
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13 |
in-progress
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14
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3
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Mean distance traveled from last nest location
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in-progress |
in-progress
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0.7 miles
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0.1-0.4 miles
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Farthest distance traveled from last location
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in-progress |
in-progress
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4.0 miles
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0.1-0.6 miles
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