INVESTIGADORES
OJEDA valeria Susana
artículos
Título:
Breeding biology and social behaviour of Magellanic Woodpeckers (Campephilus magellanicus) in Argentine Patagonia
Autor/es:
OJEDA, V.
Revista:
European Journal of Wildlife Research
Editorial:
Springer
Referencias:
Lugar: Berlin Heidelberg, Alemania; Año: 2004 vol. 50 p. 18 - 24
ISSN:
1439-0574
Resumen:
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 summarize
data on the social and breeding biology of this woodpecker,
based on 22 active nests located from 19982002
in forests from northwestern Argentine Patagonia.
Woodpeckers normally traveled in pairs or family parties.
In late Austral winter, one to three cavities were
selected for completion at each territory. Breeding
occurred between mid- to late spring and early to
mid-summer, and took about 65 days. Monogamous
parents shared duties in nest excavation, incubation
and young rearing. Egg length (±SD) measured
34.13±0.79 mm and egg breadth 23.91±0.67 mm, and
incubation took roughly 20 days. Nestlings were altricial
and remained at the nest for about 45 days. Clutch size
was one, occasionally two eggs, and one nestling was
produced at all successful nests. Young remained with
their family group for up to 2 years or more, and were
fed by adults, who normally bred every second year.
Nest re-use, nest predation and helpers at the nest were
not recorded. Holes were placed (±SD) 8.84±3.71 m
high and were 32.3±5.32 cm deep. Entrances (±SD)
were 8.92±0.46 cm wide and 15.59±2.54 cm high and
mostly oval in shape. Peculiarities of the breeding biology
and social behaviour of this species are discussed in
the light of patterns common to picids, especiallyCampephilus
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 summarize
data on the social and breeding biology of this woodpecker,
based on 22 active nests located from 19982002
in forests from northwestern Argentine Patagonia.
Woodpeckers normally traveled in pairs or family parties.
In late Austral winter, one to three cavities were
selected for completion at each territory. Breeding
occurred between mid- to late spring and early to
mid-summer, and took about 65 days. Monogamous
parents shared duties in nest excavation, incubation
and young rearing. Egg length (±SD) measured
34.13±0.79 mm and egg breadth 23.91±0.67 mm, and
incubation took roughly 20 days. Nestlings were altricial
and remained at the nest for about 45 days. Clutch size
was one, occasionally two eggs, and one nestling was
produced at all successful nests. Young remained with
their family group for up to 2 years or more, and were
fed by adults, who normally bred every second year.
Nest re-use, nest predation and helpers at the nest were
not recorded. Holes were placed (±SD) 8.84±3.71 m
high and were 32.3±5.32 cm deep. Entrances (±SD)
were 8.92±0.46 cm wide and 15.59±2.54 cm high and
mostly oval in shape. Peculiarities of the breeding biology
and social behaviour of this species are discussed in
the light of patterns common to picids, especially) is a poorly known species endemic of the
Austral Temperate Forests of South America, where it is
a potential keystone habitat modifier. Here, I summarize
data on the social and breeding biology of this woodpecker,
based on 22 active nests located from 19982002
in forests from northwestern Argentine Patagonia.
Woodpeckers normally traveled in pairs or family parties.
In late Austral winter, one to three cavities were
selected for completion at each territory. Breeding
occurred between mid- to late spring and early to
mid-summer, and took about 65 days. Monogamous
parents shared duties in nest excavation, incubation
and young rearing. Egg length (±SD) measured
34.13±0.79 mm and egg breadth 23.91±0.67 mm, and
incubation took roughly 20 days. Nestlings were altricial
and remained at the nest for about 45 days. Clutch size
was one, occasionally two eggs, and one nestling was
produced at all successful nests. Young remained with
their family group for up to 2 years or more, and were
fed by adults, who normally bred every second year.
Nest re-use, nest predation and helpers at the nest were
not recorded. Holes were placed (±SD) 8.84±3.71 m
high and were 32.3±5.32 cm deep. Entrances (±SD)
were 8.92±0.46 cm wide and 15.59±2.54 cm high and
mostly oval in shape. Peculiarities of the breeding biology
and social behaviour of this species are discussed in
the light of patterns common to picids, especially
Campephilus spp.spp.