| blood parasites of nearctic-neotropical migrant passerine birds during spring trans-gulf migration: impact on host body condition. | to test the hypothesis that migrants infected with blood parasites arrive on the northern coast of the gulf of mexico in poorer condition than uninfected birds, we examined 1705 migrant passerine birds representing 54 species of 11 families from 2 gulf coast sites for blood parasites. three hundred and sixty (21.1%) were infected with 1 or more species of 4 genera of blood parasites. the prevalence of parasites was as follows: haemoproteus spp. (11.7%), plasmodium spp. (6.7%), leucocytozoon spp. ... | 2006 | 17152939 |
| lipid and water depletion in migrating passerines following passage over the gulf of mexico. | lipid depletion is currently believed to be the primary factor limiting flight duration of migrating birds in north america, while the influence of water loss is thought to be small. three migrating species of passerines, wood thrush (hylocichla mustelina), swainson's thrush (catharus ustulatus), and summer tanager (piranga rubra) were captured during the 1993 spring migration just after crossing the gulf of mexico and examined for lipid and water depletion. the redwinged blackbird (agelaius pho ... | 1996 | 28307151 |
| two new species and new records of nasal mites of the genus sternostoma (acarina: rhinonyssinae) from birds in texas. | two new species and new host and locality records are established for nasal mites of the genus sternostoma from birds in texas. sternostoma tracheacolum lawrence is reported for the first time from pipilo fuscus and pyrrhuloxia sinuata, respectively. additionally, a new host record for sternostoma porteri hyland from centurus aurifrons and a new locality record for sternostoma pirangae pence from piranga rubra are established. a redescription is provided for sternostoma augei amaral from speotyt ... | 1975 | 1127568 |
| variation in carotenoid-protein interaction in bird feathers produces novel plumage coloration. | light absorption by carotenoids is known to vary substantially with the shape or conformation of the pigment molecule induced by the molecular environment, but the role of interactions between carotenoid pigments and the proteins to which they are bound, and the resulting impact on organismal coloration, remain unclear. here, we present a spectroscopic investigation of feathers from the brilliant red scarlet ibis (eudocimus ruber, threskiornithidae), the orange-red summer tanager (piranga rubra, ... | 2012 | 22832362 |
| habitat shift and geographical variation in north american tanagers (thraupinae: piranga). | relationships of habitat structure among north american tanagers were studied in large areas of their breeding ranges in the usa. in the large areas sampled, the four species differ significantly in multivariate scores of habitat structure. in scarlet and summer tanagers (for which the most data was collected) there is intraspecific geographical variation in habitat features. variation in habitats of summer tanagers is more pronounced than that of scarlet tanagers, and is related to changes of m ... | 1984 | 28311026 |