• Corpus ID: 10413879


  author={Laura Chazarreta and Valeria Ojeda and Martjan Lammertink},
– Ecological differentiation arising from morphological and behavioral differences, together with social dominance, is known to promote niche differentiation between sexes in birds. The absence of competing species would favor intersexual differences. The Magellanic Woodpecker (Campephilus magellanicus) is the only large woodpecker in the southern beech Nothofagus forests of Patagonia, with no competitors. Sexual divergence in morphology had been documented by preliminary research, and… 

Figures and Tables from this paper

Intersexual segregation in foraging microhabitat use by Magellanic Woodpeckers (Campephilus magellanicus): Seasonal and habitat effects at the world's southernmost forests
The results suggest that the conservation of this forest specialist, dimorphic and charismatic woodpecker species requires considering differences in habitat use between males and females.
The fruit of competition: seed dispersal by Magellanic Woodpeckers in the threatened Valdivian Rainforest.
New evidence is provided that females and juveniles, when competitively displaced from preferred foraging microhabitat by males, regularly consume fruits and may act as an important seed disperser in the threatened Valdivian forests.
Does foraging competition drive plumage convergence in three look-alike Atlantic Forest woodpecker species?
Limited resource and substrate overlap among the three woodpecker species, lack of interspecific interactions, and rarity of the Helmeted Woodpecker do not match predictions if these species were conforming to a mimicry complex under the hypothesis of ISDM, and plumage convergence may aid in interactions with third species, or impart advantages in intraspecific competition.
Magellanic Woodpeckers in three national parks of central-southern Chile: habitat effects and population variation over the last two decades
Results show a distinctive temporal variation in woodpecker abundance at each park, and suggest that regional conservation of Magellanic Woodpeckers requires expanding the current conservation area network in central-southern Chile.
Deforestation patterns shape population structure of the Magellanic Woodpecker (Campephilus magellanicus) in southern Chile
One important landscape-scale consequence of deforestation is reduced connectivity, which has the potential to isolate populations in ways that affect genetic diversity and population structure.
Behavioral switching in Magellanic woodpeckers reveals perception of habitat quality at different spatial scales
ContextThe switching pattern between behavioral modes provides a mechanistic basis for understanding how animals perceive and memorize the habitat quality in their home ranges.ObjectivesWe assessed
Preliminary assessment of the influence of larvae availability on the foraging behavior of Magellanic woodpeckers Evaluación preliminar de la influencia de la disponibilidad de larvas en el comportamiento de forrajeo del carpintero negro
The largest South American woodpecker, the Magellanic woodpecker (Campephilus magellanicus), as well as its habitat, Nothofagus spp. old-growth forests, are declining throughout their range. We
Foraging Behaviour in Magellanic Woodpeckers Is Consistent with a Multi-Scale Assessment of Tree Quality
It is suggested that Magellanic woodpeckers make foraging decisions based on the relative quality of trees that they perceive and memorize information at different spatio-temporal scales.
Indicadores del decaimiento en bosques de Nothofagus pumilio en el norte de la Patagonia, Argentina
The intensity of decline with radial growth in 294 Nothofagus pumilio trees in northern Patagonia was related with the use of the following external indicators: crown mortality, bark health, the incidence of boring insects and woodpeckers, as well as the presence of hemiparasite plants, fungi and lichens.
Sexual dimorphism driven by intersexual resource competition: Why is it rare, and where to look for it?
This work investigates why and when dimorphism might fail to evolve even if genetic covariation between the sexes posed no constraint, and highlights that introducing conflict can also be responsible for sexual monomorphism.


Bill dimorphism and foraging niche partitioning in the green woodhoopoe
Cooperative breeding green woodhoopoes, Phoeniculus purpureus, forage mainly as close-knit groups, creating opportunities for intrasexual and intersexual foraging competition and support of the specialization hypothesis.
Sexual Differences in Foraging Behavior in Two Species of Dendrocopos Woodpeckers
Two recent studies on woodpeckers (Kilham, 1965; Selander, 1966) support the hypothesis of Rand (1952), which states that within a species sexual dimorphism may aid in reduction of competition for
Breeding biology and social behaviour of Magellanic Woodpeckers (Campephilus magellanicus) in Argentine Patagonia
  • V. Ojeda
  • Environmental Science
    European Journal of Wildlife Research
  • 2003
The Magellanic Woodpecker (Campephilus magellanicus) is a poorly known species endemic of the Austral Temperate Forests of South America, where it is a potential keystone habitat modifier. Here, I
A Quantitative Study of the Foraging Ecology of Downy Woodpeckers
Both male and female Downy Woodpeckers use sub—surface foraging techniques to a greater extent during the winter and superficial techniques during the warmer months, and greater use of dead trees during winter is also indicated.
Intersexual niche segregation among three bark‐foraging birds of eucalypt forests
It is argued that intersexual niche segregation is just as likely to develop under conditions of increased interspecific competition as under reduced competition.
Division of labour in parental care in the Magellanic Woodpecker Campephilus magellanicus
Parental care in the Magellanic Woodpecker seems to be in accordance with the breeding behaviour exhibited by the majority of woodpecker species, nevertheless some differences may derive from particularities of the Austral temperate forest and features of the species like one nestling brood size along with behavioural constraints on juvenile dispersal.
An Experimental Analysis of Sex‐Specific Foraging in the Downy Woodpecker, Picoides Pubescens
The hypothesis that sex-specific foraging niches in Downy Woodpeckers are caused by female avoidance of the foraging microhabitat of socially dominant males is supported.
Provisioning of Magellanic Woodpecker (Campephilus magellanicus) Nestlings with Vertebrate Prey
This is the first published account of Magellanic Woodpeckers provisioning nestlings with vertebrates, and males delivered most of the large prey, while females broughtmost of the small prey, suggesting differences in foraging strategies between sexes.
Sexual dimorphism in relation to winter foraging in the white-backed woodpecker (Dendrocopos leucotos)
Male white-backed woodpeckers in a 250-km2 study area in western Norway are significantly larger than females in bill length and depth, wing and tarsus lengths, and bodyweight, and unlike in other sexually dimorphic woodpecker species, the foraging niche breadth in wintering white-backs showed only minor sexual differences, and the sexes overlap significantly in all parameters examined.
Magellanic woodpecker (Campephilus magellanicus) abundance and foraging in Tierra del Fuego, Chile
Woodpeckers chose trees that were visited before, suggesting a pattern of tree recognition within foraging territories, and trees used for foraging were positively correlated with canopy cover and snag density and were negatively correlated with distance to nearby peatlands and beaver ponds.