Cliff (Ledge) Nesting Species

Aerial Photograph
Counts from Land

Burrow Nesting Species

Ground counts (Whole Colony)
Ground counts (Index Plots)
Radar

Crevice Nesting Species

Ground Counts

Tree and Shrub Nesting Species

Ground counts
Aerial Photograph
Marbled Murrelet

Ground Nesting Species

Complete Nest Counts
Flush Counts

Marsh-Nesting Species

Direct Nest Counts
Flight-line Counts
Surveys by Fixed-Wing Aircraft
Flush-Counts by Helicopter

Appendix A: Survey Methodologies conducted outside of the breeding season

Appendix B: Colonial breeding waterbird species of North America grouped by nesting substrate.

Appendix C: Colonial Waterbird Field Form

Appendix D: Definitions

Appendix E: Survey Form for Pacific Seabird Database

Appendix F: Colonial Waterbird Censusing Methods/Errors Literature Matrix