Bobolink (Dolichonyx oryzivorus) Science Article 7 abstract Male and female Bobolinks (Dolichonyx oryzivorus) adjust the amount of time spent brooding and provisioning nestlings at primary nests in light of prevailing weather conditions and food availability. Males brood nestlings less and feed them more (mg/h) when food is scarce, regardless of weather conditions. Primary (i.e., first-mated) […]
Category: North America
Does the avian ophthalmic nerve carry magnetic navigationalinformation?
Bobolink (Dolichonyx oryzivorus) Science Article 3 abstract The bobolink (Dolichonyx oryzivorus) uses the earth’s magnetic field as one source of directional information for its migratory orientation. However, the location and structure of the magnetoreceptors that transduce the magnetic information to the nervous system are unknown. Because treatment with a strong magnetic pulse results in a […]
Photoperiodism and the annual testicular cycle of the bobolink (dolichonyx oryzivorus), a trans equatorial migrant, as compared with two temperate zone migrants
Bobolink (Dolichonyx oryzivorus) Science Article 5 abstract It is now quite generally accepted that seasonal changes in day-length play animportant role in the temporal regulation of several annual cyclic phenomena inmany birds of the northern hemisphere. Best known is the effect of photoperiodson the annual cycle of the testes, but evidence is accumulating that there […]
Spatial responses of bobolinks (dolichonyx oryzivorus)near different types of edges in northern iowa
Bobolink (Dolichonyx oryzivorus) Science Article 2 abstract Habitat edges are well-studied components of fragmented landscapes, yet factorsmediating edge effects remain unclear. We report how different types of edges surroundingpatches may affect spatial distributions of Bobolink (Dolichonyx oryzivorus), a declining, area-sensitive songbird that breeds in grasslands. We expected Bobolinks to be less abundant near edges, and […]
Monitoring Black Guillemot population and nesting success at Herschel Island, Yukon Territory ? 2005
Black Guillemot (Cepphus grylle) Science Article 7 abstract The Black Guillemot colony at Pauline Cove on Herschel Island is the only one in the Yukon Territory, and one of the few in the western Arctic. This colony has been monitored for population and nesting success since about 1984. The nearest Black Guillemot nesting colony to […]
Mosquito Landing Rates on Nesting American Robins
American Robin (Turdus migratorius) Science Article 2 abstract We measured mosquito landing rates on adult and nestling American robins at nests with infrared cameras inWashington, D.C., and Maryland, United States. Mosquitoes landed on nesting robins almost exclusively betweendusk and dawn. SEAN M. GRIFFING rt al, VECTOR-BORNE AND ZOONOTIC DISEASES Volume 7, Number 3, 2007 Download […]
Human Impact and the Nesting Success of the American Robin (Turdus migratorius) in Two Riparian Areas of Boulder County
American Robin (Turdus migratorius) Science Article 7 abstract American songbird populations have decreased in the last decade, partly because of factors affecting nesting success. In order to preserve songbird populations, it is important todetermine which factors are playing the most significant roles in nesting success. Humans may adversely affect nesting success simply through their presence, […]
Individual variation in fruit choice by american robins (turdus migratorius)
American Robin (Turdus migratorius) Science Article 6 abstract I tested American Robins (Turdus migratorius) for individual differences in fruitconsumption and preference when offered six trials of a three-way choice of white mulberry(red variety; Morus alba L.), Bella honeysuckle (Lonicera x bella), and red-osier dogwood (Cornus stolonifera) fruits. ROBIN E. JUNG, The Auk: 109(1):98-111, 1992 Download […]
Turdus migratorius (American robin) are more alert when solitary than in flocks
American Robin (Turdus migratorius) Science Article 5 abstract This study was undertaken to determine the relationship between foraging andalert behavior and group size in Turdus migratorius (American robin). We expected thatrobins would forage more than be alert in flocks and would be more alert than foragewhen solitary. Emily Sun, unknown Download article download full text […]
Observations on Remating in the American Robin, Turdus migratorius
American Robin (Turdus migratorius) Science Article 4 abstract In suburban Baltimore, from 1942 through 1950, I color-banded both members of15 pairs of Robins. At the end of 1951 the record of returns and rematings showedthe following: 1) Both members of eight pairs returned in the year following theirfirst known mating; there was one remating HERVEY […]