Canary Islands Stonechat (Saxicola dacotiae) Science Article 3 abstract Sexing and ageing of the Canary Islands Stonechat Saxicola dacotiae by moult. The aim ofthis study is to offer data for sexing juveniles and ageing Canary Islands Stonechats Saxicola dacotiae, an endemic and endangered bird, using data on wing measurements, moult, wing-formula and the inside colour […]
Category: Passeriformes
Ecological traits influence the current distribution and range of an island endemic bird
Canary Islands Stonechat (Saxicola dacotiae) Science Article 4 abstract The aim of this paper is to investigate the causes of the current restricteddistribution of a narrow-range endemic bird species, the Canary Islandsstonechat, Saxicola dacotiae. Juan Carlos Illera et al, Journal of Biogeography (J. Biogeogr.) (2006) 33, 1192-1201 Download article download full text (pdf)
Evolution of the major histocompatibility complex class I genes in Serinus canaria from the Canary Islands is different from that of Asian and African continental Serinus species
Canary (Serinus canaria) Science Article 1 abstract The radiation of canaries (genus Serinus) occurred in Africa and Eurasia during the Miocene Epoch (9 million years ago) according to maximum parsimony (MP), neighbor-joining (NJ), maximum likelihood (ML) and Bayesian methodologies. Serinus canaria (wild canary) and S. serinus (European serin) together form one of the several polytomies […]
Timing and duration of egg laying in duettingBuff-breasted Wrens
Buff-breasted Wren (Thryothorus leucotis) Science Article 1 abstract Using direct observations of Buff-breasted Wrens (Thryothorus leucotis), I examined timing andduration of egg laying, the behavior of females and males around the time of laying, and duetting and solo singingon laying and non-laying mornings. When laying, females roosted either alone in breeding nests or with their […]
Context matters: female aggression andtestosterone in a year-round territorialneotropical songbird (Thryothorus leucotis)
Buff-breasted Wren (Thryothorus leucotis) Science Article 2 abstract Testosterone promotes aggressive behaviour in male vertebrates during the breeding season, but theimportance of testosterone in female aggression remains unclear. Testosterone has both beneficial anddetrimental effects on behaviour and physiology, prompting the hypothesis that selection favours anassociation between aggression and testosterone only in certain contexts in which […]
FIRST RECORD OF COOPERATIVE BREEDING IN ATHRYOTHORUS WREN
Buff-breasted Wren (Thryothorus leucotis) Science Article 3 abstract Although offspring delay dispersal past the age of independence in many Thryothorus species,cooperative breeding has not been recorded in this genus. Here, I present the first observation of cooperativebreeding in a Thryothorus wren (Buff-breasted Wren, T. leucotis). Of 41 offspring that delayed dispersal pastthe age of independence, […]
THE NESTING OF SOME VENEZUELAN BIRDS
Buff-breasted Wren (Thryothorus leucotis) Science Article 4 abstract I passed the interval from 15 March to 24 July 1966 at ‘La Araguata,’ a large cattle farmsituated among the hills near Pirapira, some 20 miles south of Valencia in the state ofCarabobo, Venezuela. Although most of my time was devoted to the study of the RufousfrontedThornbird […]
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 […]
Nesting of the Buff-throated Woodcreeper (Xiphorhynchus guttatus)
Buff-throated Woodcreeper (Xiphorhynchus guttatus) Science Article 1 abstract The Buff-throated Woodcreeper (Xiphorhynchugsu ttatus) is about 22 cm long and clad in the browns and buffs widespread in its family. The sexes are alike. From Guatemala to Bolivia, Amazonian and southeastern Brazil, it inhabits rain forests, humid gallery forests in more arid regions, and mangroves. It […]
Flock composition, agonistic behaviour and body condition of wintering Bullfinches Pyrrhula pyrrhula
Bullfinch (Pyrrhula pyrrhula) Science Article 1 abstract During October-April of 1989-2003 Imade observations on size and sexual composition of Bullfinch Pyrrhula pyrrhula flocks (ringed and unringed birds), recorded interactions betweenmembers and estimated the body condition of birds observed in amixed forest in central Norway. The flock size did not change with ambient temperature and ranged […]