• Results and analysis of the most recent North American Breeding Bird Survey by the USGS Patuxent Wildlife Research Center (co-authored by Sauer, J. R., J. E. Hines, J. E. Fallon, K. L. Pardieck, D. J. Ziolkowski, Jr., and W. A. Link, 2011) provides information about more than 400 North American Birds. Maps of abundance and population change are presented for a variety of regions and can be located at:  
  •  The State of the Birds website ( ) is produced by for the U.S. Fish and Wildlife Service by the Cornell Lab of Ornithology. This “report provides the nation’s first assessment of the distribution of birds on public lands and helps public agencies identify which species have significant potential for conservation in each habitat. The state of our birds is a measurable indicator of how well we are doing as stewards of our environment.”. The State of the Birds 2011 report can be found at:
  •  Follow the embryonic development of a chick from 0 to 142 h of incubation. Courtesy of Dr. Thomas Jensen, San Diego Zoo Institute for Conservation Research. See: Chick Development
  •  Migration facts from the Smithsonian National Zoological Park:
  • Brood Parasitism: A Unique Breeding Strategy!

  • Effects of the emerald ash borer invasion on four species of birds
    • As a by-product of the emerald ash borer infestation that continues to spread, the Cornell Laboratory of Ornithology has reported increases in the population of three woodpeckers that are known to forage on pest-infested ash trees – the downy woodpecker, hairy woodpecker, red-bellied woodpecker – as well as the white-breasted nuthatch. All four species are cavity-nesters and are reported to benefit from an increase in nesting habitat as ash trees are killed. Moreover, the new and widely abundant food source appears to be enhancing overall rates of reproduction. See: