URN:catalog:ICE:TRBL:add

Observer: 
Patricia L. Shanks
Observation Date: 
2011-04-15
Best Estimate for Number of Birds Observed: 
55
Minimum Estimate for Number of Birds Observed: 
50
Maximum Estimate for Number of Birds Observed: 
60
Type of Estimate: 
Visual and Untimed
Precision of Estimate: 
Precise Count
Minutes spent at observation site: 
40
Singing: 
Yes
Carrying Nest Material: 
No
Colony quiet, Incubation inferred: 
No
Adults Carrying Food: 
No
Fledglings out of Nest: 
No
Distance to Stored Grains: 
less than 100 meters
Distance to Water: 
less than 10 meters
Area Estimate (square meters): 
93

Colony located just south of the gated entrance to the California Aquaduct off Munz Ranch Road in a narrow draw that extended from the top of the hillside down to Munz Ranch Road and the road into the aquaduct. The primary nest substrate appeared to be stinging nettles. The width of the substrate varied from about 20 feet to about 10 feet in various places along the draw. Surrounding land use was generally high desert scrub, with what appeared to be a small horse ranch located on the east side of Munz Ranch Road. TCBs were observed foraging at this small ranch. Approximate ratio of males to females observed was 8:1, but difficult to estimate because of birds entering and leaving the site.