The Christmas Bird Count of the National Audubon Society is a unique resource for ornithological researchers: a continent-wide survey of early winter bird numbers going back to 1900. Each published census is a count of all the birds in a 15-mile-diameter circle on one day between mid-December and early January.
This document describes the implementation of a Web-based application to display a report showing the history of a given circle or combination of circles.
This system is built on top of a number of existing layers that are documented elsewhere.
pycbc: A Python interface to the Christmas Bird Count
database describes the database
that holds the raw data.
A general system for describing the kinds of birds is
presented in xnomo3: A system for
representing bird taxonomoy.
In particular, the database uses the system of six-letter
codes described here. For example, American Robin is
AMEROB, and Zone-tailed Hawk as
ZOTHAW. The linked document discusses how
each such code represents a specific taxonomic grouping.
Click here to generate reports using this system.