Chart 2:
YEARLY CAPTURES of UNBANDED
RUBY-THROATED HUMMINGBIRDS

All text, data, and graphics © Operation RubyThroat

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CHART 2: Since 1984, an average of 168 Ruby-throated Hummingbirds have been banded annually at Hilton Pond Center for Piedmont Natural History near York, South Carolina USA; the highest year was 2005 with 226 new RTHU; an unexplained "crash" occurred during the following year.

Partial field seasons (light blue columns) resulted from the bander being involved in field work at other locations. The red line indicates a slight but steady rise in the average number of RTHUs banded over the 23-year span.

All text, data, and graphics © Operation RubyThroat

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