URN:catalog:ICE:TRBL:add

Observer: 
John Irwin
Location: 
Markham Ravine
Observation Date: 
2011-04-16
Best Estimate for Number of Birds Observed: 
0
Minimum Estimate for Number of Birds Observed: 
0
Maximum Estimate for Number of Birds Observed: 
0
Type of Estimate: 
Visual and Untimed
Precision of Estimate: 
Precise Count
Minutes spent at observation site: 
15

No birds observed on 4/15 and 4/16, during survey count. Prior visit earlier in the week revealed 300 or so tricolors at the three blackberry brambles with constitute this group of nesting colonies, listed as one location.