Category: Cardinalidae

Malformed Bill of Rose-breasted Grosbeak

Rose-breasted Grosbeak (Pheucticus ludovicianus) Science Article 1 abstract On September 4, 1904, a boy brought to me an adult female Rose-breasted Grosbeak (Zamelodialudoviciana), the bill of which presented a curious realformation. Careful examination shows that the condition was not caused by injury, as there is no trace whatever of a fracture, and the upper mandible […]

Male Parental Care and Extrapair Copulations in the Indigo Bunting

Indigo Bunting (Passerina cyanea) Science Article 6 abstract Levels of parental care by male Indigo Buntings (Passerina cyanea) were predicted to be lower and the tendency to pursue extrapair matings greater when (1) the opportunity of additional matings (extrapair copulations) was high, (2) the male was cuckolded, and (3) the clutch or brood size was […]

THE EFFECTS OF PATCH SHAPE ON INDIGO BUNTINGS: EVIDENCE FOR AN ECOLOGICAL TRAP

Indigo Bunting (Passerina cyanea) Science Article 1 abstract Habitat loss and fragmentation have led to a widespread increase in the proportion of edge habitat in the landscape. Disturbance-dependent bird species are widely assumed to benefit from these edges. However, anthropogenic edges may concentrate nest predators while retaining habitat cues that birds use to select breeding […]

MIGRATORY FEATURES OF THE INDIGO BUNTING IN JAMAICA AND FLORIDA

Indigo Bunting (Passerina cyanea) Science Article 5 abstract Recent years have seen the accumulation of many useful quan- titative and qualitative data pertaining to weight and fat in migratory birds. Most investigations of this nature have thus far dealt with birds breeding and overwintering on north temperate land masses, but few quantitative data pertaining to […]

Replaced primaries in first nuptial plumage of Passerina cyanea.

Indigo Bunting (Passerina cyanea) Science Article 3 abstract Dwight pointed out (1900, p. 211 et seq.) long ago that the Indigo Bunting replacessome outer primaries at the postjuvenal molt. These replaced primaries (in the male) have blue outer vanes contrasting sharply with the blackish outer vanes of the juvenal primaries, except that primary 9 has […]

Buff-throated Saltator eats army ants

Buff-throated Saltator (Saltator maximus) Science Article 1 abstract The relationship between army ants and birds in Neotropical forests has been studied carefully by Willis and others (see Willis and Oniki 1978, and included references). The birds that attend the ant swarms forage upon the invertebrates and small vertebrates that flee the ants (Willis and Oniki […]

FEMALE MATE CHOICE IN RELATION TO STRUCTURAL PLUMAGE COLORATION INBLUE GROSBEAKS

Blue Grosbeak (Passerina caerulea) Science Article 1 abstract Plumage blueness in Blue Grosbeaks (Passerina caerulea) is related to nutritional conditionduring molt, and bluer males hold larger territories with more food resources. We tested the hypothesis that females use male plumage brightness as a criterion in choosing mates. In a mate-choice aviary, we presented females with […]

Effects of breeding density and plumagecoloration on mate guarding and cuckoldry in bluegrosbeaks (Passerina caerulea)

Blue Grosbeak (Passerina caerulea) Science Article 3 abstract For species in which females mate outside of the pair bond, selection should favor male mate-guarding behaviors that minimize investment in genetically unrelated offspring. Mate guarding may impose costs by diverting time and energy from activities such as foraging and seeking extra-pair copulations, so males should adjust […]