Travis AFB Sustainability Study Report Final Background Report | Page 145
Table 5.4‐1.
Species
Bird Strike History from 2007‐2015
Percent of
Number of
Strikes
Strikes
44% 102 $66,669
No Remains /
Unknown 19% 43 $24,473
Swallows / Swifts 12% 28 $38
Raptors and Vultures 9% 21 $56,619
Waterfowl 4% 10 $319,576
Shorebirds and
Wading Birds 4% 8 $43,913
Pigeons and Doves 3% 6 $764
Mammals 3% 6 $169,002
European Starlings /
Blackbirds 2% 5 $187,155
Gulls <1% 2 N/A
Crows and Ravens <1% 1 $3,939
100% 232 $872,148
Source: Travis AFB Wildlife Hazard Assessment
The presence of birds can impact flight operations at Travis AFB. A Bird
Watch Condition is maintained by the Airfield Manager, the Wildlife Control
Team, and the Tower Watch Supervisor on‐Base. Condition levels that are
used to warn aircrew and support personnel of bird threats are low,
moderate, and severe.
A low condition level indicates normal wildlife activity, fewer than five
large birds or 15 small birds on or above the airfield. Operations are
only limited under low conditions during sunrise and sunset during
migratory waterfowl season, typically September to April.
TSS Background Report
A moderate condition level indicates an increased wildlife population,
five to 15 large birds or 15 to 30 small birds in the area. Under
moderate conditions, all aircraft departures require approval by the
Operations Group Commander and all local traffic pattern activity is
stopped. Additionally, takeoffs and landings are only allowed once
routes avoid identified bird activity under moderate conditions.
A severe condition level indicates a high wildlife population, more
than 15 large bi