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Roosting behaviour of the tawny frogmouth (Podargus strigoides)

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Zeitschriftentitel: Journal of Zoology
Personen und Körperschaften: Körtner, Gerhard, Geiser, Fritz
In: Journal of Zoology, 248, 1999, 4, S. 501-507
Format: E-Article
Sprache: Englisch
veröffentlicht:
Wiley
Schlagwörter:
Animal Science and Zoology
Ecology, Evolution, Behavior and Systematics
author_facet Körtner, Gerhard
Geiser, Fritz
Körtner, Gerhard
Geiser, Fritz
author Körtner, Gerhard
Geiser, Fritz
spellingShingle Körtner, Gerhard
Geiser, Fritz
Journal of Zoology
Roosting behaviour of the tawny frogmouth (Podargus strigoides)
Animal Science and Zoology
Ecology, Evolution, Behavior and Systematics
author_sort körtner, gerhard
spelling Körtner, Gerhard Geiser, Fritz 0952-8369 1469-7998 Wiley Animal Science and Zoology Ecology, Evolution, Behavior and Systematics http://dx.doi.org/10.1111/j.1469-7998.1999.tb01049.x <jats:title>Abstract</jats:title><jats:p>We characterized the day roost sites of four pairs and one solitary tawny frogmouth <jats:italic>Podargus strigoides</jats:italic> in a woodland in south‐eastern Australia. The birds were equipped with radio transmitters which enabled us to locate them daily from autumn 1997 to late summer 1998. Tree species, tree size, roost height and orientation of the roosting bird were recorded. Over the study period tawny frogmouths frequented a large number of day roosts (up to 71 per pair). Birds rarely used the same roost over extended time periods and most roosts were used for less than 3 days. Mature trees with a girth of more than 0.5 m were preferred as day roosts. Tawny frogmouths exhibited a significant preference for the coarse and dark‐barked stringybark trees, but other tree species such as the smooth‐barked, light‐coloured gums were also frequented. However, when roosting in gum trees, dead branches were preferred, presumably as these have a coarser appearance than living branches and therefore provided better camouflaging. Especially during winter, the birds showed a significant selection of branches on the northern side of roost trees presumably to maximize sun exposure. During summer, two pairs maintained a significant northerly preference, whereas the others used roosts with random orientations. Small‐scale seasonal movements in the area used for day roosting were also observed, with two pairs selecting a distinct area with a south‐westerly aspect during summer which appeared to have less sun exposure. Our study suggests that tawny frogmouths select roosts to (1) minimize visibility from day predators and (2) to facilitate passive thermoregulation by sun‐basking.</jats:p> Roosting behaviour of the tawny frogmouth (<i>Podargus strigoides</i>) Journal of Zoology
doi_str_mv 10.1111/j.1469-7998.1999.tb01049.x
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title Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_unstemmed Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_full Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_fullStr Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_full_unstemmed Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_short Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_sort roosting behaviour of the tawny frogmouth (<i>podargus strigoides</i>)
topic Animal Science and Zoology
Ecology, Evolution, Behavior and Systematics
url http://dx.doi.org/10.1111/j.1469-7998.1999.tb01049.x
publishDate 1999
physical 501-507
description <jats:title>Abstract</jats:title><jats:p>We characterized the day roost sites of four pairs and one solitary tawny frogmouth <jats:italic>Podargus strigoides</jats:italic> in a woodland in south‐eastern Australia. The birds were equipped with radio transmitters which enabled us to locate them daily from autumn 1997 to late summer 1998. Tree species, tree size, roost height and orientation of the roosting bird were recorded. Over the study period tawny frogmouths frequented a large number of day roosts (up to 71 per pair). Birds rarely used the same roost over extended time periods and most roosts were used for less than 3 days. Mature trees with a girth of more than 0.5 m were preferred as day roosts. Tawny frogmouths exhibited a significant preference for the coarse and dark‐barked stringybark trees, but other tree species such as the smooth‐barked, light‐coloured gums were also frequented. However, when roosting in gum trees, dead branches were preferred, presumably as these have a coarser appearance than living branches and therefore provided better camouflaging. Especially during winter, the birds showed a significant selection of branches on the northern side of roost trees presumably to maximize sun exposure. During summer, two pairs maintained a significant northerly preference, whereas the others used roosts with random orientations. Small‐scale seasonal movements in the area used for day roosting were also observed, with two pairs selecting a distinct area with a south‐westerly aspect during summer which appeared to have less sun exposure. Our study suggests that tawny frogmouths select roosts to (1) minimize visibility from day predators and (2) to facilitate passive thermoregulation by sun‐basking.</jats:p>
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author Körtner, Gerhard, Geiser, Fritz
author_facet Körtner, Gerhard, Geiser, Fritz, Körtner, Gerhard, Geiser, Fritz
author_sort körtner, gerhard
container_issue 4
container_start_page 501
container_title Journal of Zoology
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description <jats:title>Abstract</jats:title><jats:p>We characterized the day roost sites of four pairs and one solitary tawny frogmouth <jats:italic>Podargus strigoides</jats:italic> in a woodland in south‐eastern Australia. The birds were equipped with radio transmitters which enabled us to locate them daily from autumn 1997 to late summer 1998. Tree species, tree size, roost height and orientation of the roosting bird were recorded. Over the study period tawny frogmouths frequented a large number of day roosts (up to 71 per pair). Birds rarely used the same roost over extended time periods and most roosts were used for less than 3 days. Mature trees with a girth of more than 0.5 m were preferred as day roosts. Tawny frogmouths exhibited a significant preference for the coarse and dark‐barked stringybark trees, but other tree species such as the smooth‐barked, light‐coloured gums were also frequented. However, when roosting in gum trees, dead branches were preferred, presumably as these have a coarser appearance than living branches and therefore provided better camouflaging. Especially during winter, the birds showed a significant selection of branches on the northern side of roost trees presumably to maximize sun exposure. During summer, two pairs maintained a significant northerly preference, whereas the others used roosts with random orientations. Small‐scale seasonal movements in the area used for day roosting were also observed, with two pairs selecting a distinct area with a south‐westerly aspect during summer which appeared to have less sun exposure. Our study suggests that tawny frogmouths select roosts to (1) minimize visibility from day predators and (2) to facilitate passive thermoregulation by sun‐basking.</jats:p>
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spelling Körtner, Gerhard Geiser, Fritz 0952-8369 1469-7998 Wiley Animal Science and Zoology Ecology, Evolution, Behavior and Systematics http://dx.doi.org/10.1111/j.1469-7998.1999.tb01049.x <jats:title>Abstract</jats:title><jats:p>We characterized the day roost sites of four pairs and one solitary tawny frogmouth <jats:italic>Podargus strigoides</jats:italic> in a woodland in south‐eastern Australia. The birds were equipped with radio transmitters which enabled us to locate them daily from autumn 1997 to late summer 1998. Tree species, tree size, roost height and orientation of the roosting bird were recorded. Over the study period tawny frogmouths frequented a large number of day roosts (up to 71 per pair). Birds rarely used the same roost over extended time periods and most roosts were used for less than 3 days. Mature trees with a girth of more than 0.5 m were preferred as day roosts. Tawny frogmouths exhibited a significant preference for the coarse and dark‐barked stringybark trees, but other tree species such as the smooth‐barked, light‐coloured gums were also frequented. However, when roosting in gum trees, dead branches were preferred, presumably as these have a coarser appearance than living branches and therefore provided better camouflaging. Especially during winter, the birds showed a significant selection of branches on the northern side of roost trees presumably to maximize sun exposure. During summer, two pairs maintained a significant northerly preference, whereas the others used roosts with random orientations. Small‐scale seasonal movements in the area used for day roosting were also observed, with two pairs selecting a distinct area with a south‐westerly aspect during summer which appeared to have less sun exposure. Our study suggests that tawny frogmouths select roosts to (1) minimize visibility from day predators and (2) to facilitate passive thermoregulation by sun‐basking.</jats:p> Roosting behaviour of the tawny frogmouth (<i>Podargus strigoides</i>) Journal of Zoology
spellingShingle Körtner, Gerhard, Geiser, Fritz, Journal of Zoology, Roosting behaviour of the tawny frogmouth (Podargus strigoides), Animal Science and Zoology, Ecology, Evolution, Behavior and Systematics
title Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_full Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_fullStr Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_full_unstemmed Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_short Roosting behaviour of the tawny frogmouth (Podargus strigoides)
title_sort roosting behaviour of the tawny frogmouth (<i>podargus strigoides</i>)
title_unstemmed Roosting behaviour of the tawny frogmouth (Podargus strigoides)
topic Animal Science and Zoology, Ecology, Evolution, Behavior and Systematics
url http://dx.doi.org/10.1111/j.1469-7998.1999.tb01049.x