URN:catalog:ICE:TRBL:5902

Observer: 
Annie Chang
Observation Date: 
2011-04-15
Best Estimate for Number of Birds Observed: 
880
Minimum Estimate for Number of Birds Observed: 
800
Maximum Estimate for Number of Birds Observed: 
1000
Type of Estimate: 
Visual and Untimed
Precision of Estimate: 
Scanning Blocks
Minutes spent at observation site: 
100
Singing: 
Yes
Carrying Nest Material: 
Yes
Colony quiet, Incubation inferred: 
Yes
Adults Carrying Food: 
No
Fledglings out of Nest: 
No
Distance to Water: 
greater than 100 meters
Area Estimate (square meters): 
10000

The colony was not excessively noisy. There was some singing, but often the colony was quiet. There was not a lot of carrying of nesting material. The birds observed were mostly males, not many females were observed. It is likely that incubation had begun. Land to the south appears to be grazed. Primary nest substrate is milk thistle. Surrounding land use includes grazed grassland to the south and agricultural land to the north, west and east. The "area estimate" is probably overestimated. There were 2 patches within that area where the birds were actually nesting.