Red-eyed Vireo (Vireo olivaceus) Science Article 4 abstract One of the most enduring puzzles in the systematics of New World birds concerns the relationships and taxonomic status of forms in the Red-eyed, Yellow-green and Chivi Vireo complex. In recent decades, the latter two taxa have been treated either as distinct species (A.O.U. 195 7, Hamilton […]
Red-eyed Vireo (Vireo olivaceus)
Red-eyed Vireo (Vireo olivaceus) Science Article 2 abstract Over the past several years, songbirds and the reasons for declines in their populationshave been a focal point of interest. Many species of neotropical songbirds birds haveexperienced population declines due to losses and fragmentation of breeding, wintering, andmigratory habitats. These long-distance migrants tend to be more vulnerable […]
FIRST MAINLAND RECORD OF THE RED-BREASTED NUTHATCH FROM BAJA CALIFORNIA, MEXICO
Red-breasted Nuthatch (Sitta canadensis) Science Article 2 abstract On 15 September 1990 we collected a Red-breasted Nuthatch (Sitta canadensis) at Rancho Casa Verde. western slope of the Sierra Jubrez, east of Ensenada GORGONIO RUIZ-CAMPOS and LORENZO QUINTANA-BARRIOS, Western Birds 22:189-190, 1991 Download article download full text (pdf)
Parental investment strategies in two species of nuthatch varywith stage-specific predation risk and reproductive effort
Red-breasted Nuthatch (Sitta canadensis) Science Article 1 abstract Life-history theory predicts that differences in reproductive effort and residual reproductive value amongspecies should result in differences in the level of risk that parents are willing to tolerate to themselvesversus their offspring. CAMERON K. GHALAMBOR & THOMAS E. MARTIN, ANIMAL BEHAVIOUR, 2000, 60, 263-267 Download article download […]
Is the later arrival of young male red-breasted flycatchers ( Ficedula parva ) related to their physical condition?
Red-breasted Flycatcher (Ficedula parva) Science Article 2 abstract Intraspecific variation in the arrival time of migratory birds to breeding grounds is common. Although this phenomenon has been explained in various ways, the condition-dependency of arrival is often evoked. I analyzed the arrival time of male red-breasted flycatchers Ficedula parva, a long-distance migratory passerine, in relation […]
First evidence of phenological change in a transcontinental migrant overwintering in the Indian sub-continent: the Red-breasted Flycatcher Ficedula parva
Red-breasted Flycatcher (Ficedula parva) Science Article 3 abstract We analysed data on the Red-breasted Flycatcher Ficedula parva collected in old- growth, oak-hornbeam stands in the primeval Forest, Poland during 1973- 2002. In this period, the Red-breasted Flycatcher’s return to its breeding sites became sig nificantly earlier whilst population size did not change significantly. We show […]
The influence of male age and phenology on reproductive success of the red-breasted flycatcher (Ficedula parva)
Red-breasted Flycatcher (Ficedula parva) Science Article 1 abstract I studied arrival time, breeding phenology, and breeding success in relation to the age class (second year and older) of male red-breasted flycatchers for six breeding seasons (2000-2005) in the prim val Bialowieza Forest, eastern Poland. Older males, i.e. older than two years (ASY), arrived on average […]
THE RED-BILLED TROPICBIRD PHaeTHON RUBRICAUDA IN HAWAII,WITH NOTES ON INTERSPECIFIC BEHAVIOR OF TROPICBIRDS
Red-billed Tropicbird (Phaethon aethereus) Science Article 1 abstract Two of the world’s three tropicbird species (Fig. 1) are regular breeders in the Hawaiian Islands. The Red-tailed Tropicbird Phaethon rubricauda is more common in the NorthwesternHawaiian Islands; the White-tailed Tropicbird P. lepturus is more common in the main Hawaiian Islands ERIC A. VANDERWERF and LINDSAY C. […]
Red-billed Tropicbird on Long Island, New York
Red-billed Tropicbird (Phaethon aethereus) Science Article 2 abstract The Red-billed Tropicbird(Phaethon aethereus) is a pan-tropical species and one of its subspecies, mesonauta,breeds in eastern North America as far north as the Virgin Islands JOHN L. BULL, Auk, Vol. 81 Download article download full text (pdf)
Which method is most suitable for censusingbreeding populations of red-backed (Laniuscollurio) and great grey (L. excubitor) shrikes?
Red-backed Shrike (Lanius collurio) Science Article 3 abstract Up to now, studies have shown that it is very difficult to estimate accurate numbers of shrike(Lanius spp) breeding pairs. During our shrike biology research in Western Poland this problemwas evident. Actual breeding pair numbers were derived from a combination of specialcounts in the pre-breeding period, intensive […]