This journal provides immediate access to some articles. Volume 271(1555); November 22, 2004 Novel chromatic and structural biomarkers of diet in carotenoid-bearing plumage. PMCID: PMC1691864 Survival costs of reproduction in the blue tit (Parus caeruleus): a role for blood parasites? PMCID: PMC1691872 Sexual selection and the risk of extinction in mammals. PMCID: PMC1691875 | ||