Black-browed Albatross (Thalassarche melanophris) Science Article 2 abstract The diet of Black-browed Albatross Thalassarche melanophrys has been studied at several sub-Antarctic colonies (e.g. Ridoux 1994, Reid et al. 1996, Xavier et al. 2003) and found to consist mainly of fish, cephalopods and crustaceans. JUAN P. SECO PON and PATRICIA A. GANDINI, Marine Ornithology 36: 77-78 […]
The influence of parental relatedness on reproductive success
Black-browed Albatross (Thalassarche melanophris) Science Article 9 abstract The relationship between
Body mass change strategies in blackbirds Turdus merula: the starvation-predation risk trade-off
Blackbird (Turdus merula) Science Article 4 abstract It is theoretically well established that body mass in birds is the consequence of a trade-off between starvation risk and predation risk. There are, however, no studies of mass variation from sufficiently large wild populations to model in detail the range of diurnal and seasonal mass change patterns […]
The effect of nest-height on the seasonal pattern of breeding success in Blackbirds Turdus merula
Blackbird (Turdus merula) Science Article 3 abstract An urban Blackbird Turdus merula population was studied in Budapest from 1986 to 1989. Seasonal pattern of breeding success was similar in three out of the four years: early nests were successful then the success rapidly fell, reaching another maximum in the third part of the breeding season, […]
Effects of fat reserves on annual apparent survival of blackbirds Turdus merula
Blackbird (Turdus merula) Science Article 5 abstract Fat reserves are stored energy that may help birds survive periods of harsh winter weather. This hypothesis predicts that annual apparent survival is higher for birds with large fat reserves than for birds with few or no fat reserves in winter. Blackbirds (Turdus merula Linnaeus) were ringed in […]
Recruitment patterns of Blackbirds (Turdus merula) in urban fragmented populations
Blackbird (Turdus merula) Science Article 1 abstract The purpose of this paper is to study the effects of habitat fragmentation on Blackbird Turdus merula recruitment in 21 urban parks in the city of Madrid (Spain) during two consecutive breeding seasons (1997-98). We found that: (1) recruitment did not vary between years, showing high levels of […]
Is urbanisation of European blackbirds (Turdus merula) associated with genetic differentiation?
Blackbird (Turdus merula) Science Article 2 abstract Because of the extreme ecological and environmental changes along an urban-rural gradient, it has been proposed that urbanised and non-urbanised populations of the same species may be distinctly isolated. There is evidence that urban populations have become significantly different from the original forest populations in several aspects. However, […]
Phylogeny of the cuckoo genus Coccyzus (Aves: Cuculidae): a test of monophyly
Black-billed Cuckoo (Coccyzus erythropthalmus) Science Article 1 abstract Coccyzus comprises nine species of New World cuckoos (Aves: Cuculidae)that breed from southern Canada to central South America. The phylogeny of thisgenus was reconstructed using 2490 base pairs of the mitochondrial genes Janice M. Hughes, Systematics and Biodiversity 4 (4): 483-488, 2006 Download article download full text […]
EXTERNAL DIFFERENCES BETWEEN NEWLY HATCHED CUCKOOS (COCCYZUS AMERICANUS AND C. ERYTHROPTHALMUS
Black-billed Cuckoo (Coccyzus erythropthalmus) Science Article 3 abstract Yellow-billed Cuckoos (Coccyzus americanus) and Black-billed Cuckoos (C. erythropthalmus), although nonparasitic, do from time to time lay their eggs in the nests of each other and of various passerines VAL NOLAN, JR., Condor(77)3:341 Download article download full text (pdf)
Erect Posture of the Young Black-billed Cuckoo: An Adaptation for Early Mobility in a Nomadic Species
Black-billed Cuckoo (Coccyzus erythropthalmus) Science Article 2 abstract The vertical or perpendicular pose of the young Black-billed Cuckoo (Coccyzuse rythropthalmush) as been suggestedto function in concealing the young, implicitly from predators (e.g. Herrick 1910, Bent 1940). F. H. Kennard (in Bent 1940: 75-76) gives thefollowing description of a young Black-billed Cuckoo in this pose SPENCER […]