Swallows and Bed-Bugs

One hundred years ago, an ornithologist confessed that one, at least, of his beliefs had been shaken. He published a paper about it: “Swallows and Bed-Bugs,” Edward R. Warren, The Condor, 1913, Vol.15(1), pp.14-16. IN MY paper in the May-June CONDOR, 1912, entitled “Some North-central Colorado Bird Notes,” I referred to the belief that swallows […]

The Value of Vomit (for Rollers)

Vomit is, for the birds, of fearful value, suggests this study: “Rollers smell the fear of nestlings,” D. Parejo, L. Amo, J. Rodríguez and J.M. Avilés, Biology Letters, epub 2012.  The authors, at EEZA, CSIC, Almería, Spain, report: “Some bird species produce chemical compounds when threatened, such as nestlings of the Eurasian roller Coracias garrulus [pictured […]

The effect of climate change on great tits

This new study relates two much-discussed topics: “A model approach to project the start of egg laying of Great Tit (Parus major L.) in response to climate change,” Frank-M. Chmielewski, Klaus Blümel, Carina Scherbaum-Heberer, Bettina Koppmann-Rumpf, Karl-Heinz Schmidt, International Journal of Biometeorology, vol. 57, no. 2, March 2013, pp 287-297. (Thanks to investigator Tom Gill […]