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An open conversation about the birds in your back yard and beyond

Carbon dioxide level currently averaging over 400 ppm

Current level of carbon dioxide in the atmosphere. Information has been taken from web page of CO2Now.org, Mauna Loa CO2 Board, Scripps Institution of Oceanography. More information at https://scripps.ucsd.edu/programs/keelingcurve/

June 1, 2015 — 403.12 parts per million
June 1, 2014 — 401.67 ppm

April 2015 monthly average — 403.34 ppm
April 2014 monthly average — 401.33 ppm
2014 annual average 398.60 pm

Global data
March 2015 — 400.83 ppm
March 2014 — 398.10 p[pm
2014 annual average 397.16 ppm

Bird feathers wear away to reveal color

What is that black bird with the yellow mark on its shoulders? A reader recently asked for help in identifying a feeder bird she didn’t recognize. It was a Red-winged Blackbird, like the one shown here, with yellow bright on the wing as the red begins to appear. The trademark red epaulet is revealed as black shoulder feathers wear away. This happens as spring begins, the red fully revealed in time for the male bird to be ready for courtship. Other bird species reveal their brighrt breeding colors in the same way.

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