Home

URN:catalog:ICE:TRBL:add

February 24, 2011 - 4:47pm — rcook
Observer: 
Rose Cook
Location: 
Fisherman's Retreat
Data Source: 
Personal Observation
Observation Date: 
2010-05-03
Best Estimate for Number of Birds Observed: 
1000
Minimum Estimate for Number of Birds Observed: 
800
Maximum Estimate for Number of Birds Observed: 
1200
Type of Estimate: 
Visual and Untimed
Precision of Estimate: 
Precise Count
Minutes spent at observation site: 
180
Singing: 
Yes
Carrying Nest Material: 
No
Colony quiet, Incubation inferred: 
No
Adults Carrying Food: 
Yes
Fledglings out of Nest: 
No

Birds foraging in adjacent non-native grassland dominated by Brassica geniculata, Erodium spp., Amsynkia menzesii, and Bromus madritensis. Vegetation was very green. Birds were foraging on protected lands managed by the County of Riverside and the Riverside Parks and Open Space District. Grackles present and nesting in the marsh with the tricolors. No other avian predators observed. Vehicle and foot traffic was moderately frequent within about 30 meters of the colony but did not appear to disturb the birds.