Heterothermy in Caprimulgid Birds: A Review of Inter- and Intraspecific Variation in Free-Ranging Populations

R Brigham, A McKechnie, Lisa Doucette, F Geiser

Research output: A Conference proceeding or a Chapter in BookChapter

Abstract

Caprimulgid birds represent one of the best studied endotherm taxa in terms of the occurrence of heterothermy in free-ranging populations. In this chapter, we review currently available data on heterothermy in this group, and examine potential ecological correlates of these responses. To date, heterothermic responses have been examined in at least one population of each of six species, ranging in body mass (Mb) from 40 to 450 g and occurring in habitats from deserts to mesic woodlands. Patterns of heterothermy vary from infrequent, shallow bouts to periods of uninterrupted torpor lasting several days, during which body temperature may be reduced below 5C. Overall levels of heterothermy, as quantified using a recently proposed metric, do not show statistically significant relationships with Mb nor with ecological variables such as minimum air temperature or habitat aridity. Nevertheless, it is striking that the two most heterothermic species recorded to date, the Common Poorwill and the Freckled Nightjar, both inhabit arid habitats. Moreover, the former species remains the only bird known to hibernate. Within species, patterns of heterothermy may vary considerably among populations, with lunar cycles, temporal fluctuations in insect abundance and roost site characteristics being among the ecological determinants of heterothermy.
Original languageEnglish
Title of host publicationLiving in a Seasonal World
EditorsThomas Ruf, Claudia Bieber, Walter Arnold, Eva Millesi
Place of PublicationGermany
PublisherSpringer Verlag
Pages175-187
Number of pages13
ISBN (Print)9783642286780
Publication statusPublished - 2012
Externally publishedYes

Fingerprint

interspecific variation
birds
habitats
resting periods
dry environmental conditions
body temperature
woodlands
deserts
air temperature
insects
intraspecific variation

Cite this

Brigham, R., McKechnie, A., Doucette, L., & Geiser, F. (2012). Heterothermy in Caprimulgid Birds: A Review of Inter- and Intraspecific Variation in Free-Ranging Populations. In T. Ruf, C. Bieber, W. Arnold, & E. Millesi (Eds.), Living in a Seasonal World (pp. 175-187). Germany: Springer Verlag.
Brigham, R ; McKechnie, A ; Doucette, Lisa ; Geiser, F. / Heterothermy in Caprimulgid Birds: A Review of Inter- and Intraspecific Variation in Free-Ranging Populations. Living in a Seasonal World. editor / Thomas Ruf ; Claudia Bieber ; Walter Arnold ; Eva Millesi. Germany : Springer Verlag, 2012. pp. 175-187
@inbook{bd058a7c80084c18a4b4e6d19e23ab97,
title = "Heterothermy in Caprimulgid Birds: A Review of Inter- and Intraspecific Variation in Free-Ranging Populations",
abstract = "Caprimulgid birds represent one of the best studied endotherm taxa in terms of the occurrence of heterothermy in free-ranging populations. In this chapter, we review currently available data on heterothermy in this group, and examine potential ecological correlates of these responses. To date, heterothermic responses have been examined in at least one population of each of six species, ranging in body mass (Mb) from 40 to 450 g and occurring in habitats from deserts to mesic woodlands. Patterns of heterothermy vary from infrequent, shallow bouts to periods of uninterrupted torpor lasting several days, during which body temperature may be reduced below 5C. Overall levels of heterothermy, as quantified using a recently proposed metric, do not show statistically significant relationships with Mb nor with ecological variables such as minimum air temperature or habitat aridity. Nevertheless, it is striking that the two most heterothermic species recorded to date, the Common Poorwill and the Freckled Nightjar, both inhabit arid habitats. Moreover, the former species remains the only bird known to hibernate. Within species, patterns of heterothermy may vary considerably among populations, with lunar cycles, temporal fluctuations in insect abundance and roost site characteristics being among the ecological determinants of heterothermy.",
author = "R Brigham and A McKechnie and Lisa Doucette and F Geiser",
year = "2012",
language = "English",
isbn = "9783642286780",
pages = "175--187",
editor = "Thomas Ruf and Claudia Bieber and Walter Arnold and Eva Millesi",
booktitle = "Living in a Seasonal World",
publisher = "Springer Verlag",
address = "Germany",

}

Brigham, R, McKechnie, A, Doucette, L & Geiser, F 2012, Heterothermy in Caprimulgid Birds: A Review of Inter- and Intraspecific Variation in Free-Ranging Populations. in T Ruf, C Bieber, W Arnold & E Millesi (eds), Living in a Seasonal World. Springer Verlag, Germany, pp. 175-187.

Heterothermy in Caprimulgid Birds: A Review of Inter- and Intraspecific Variation in Free-Ranging Populations. / Brigham, R; McKechnie, A; Doucette, Lisa; Geiser, F.

Living in a Seasonal World. ed. / Thomas Ruf; Claudia Bieber; Walter Arnold; Eva Millesi. Germany : Springer Verlag, 2012. p. 175-187.

Research output: A Conference proceeding or a Chapter in BookChapter

TY - CHAP

T1 - Heterothermy in Caprimulgid Birds: A Review of Inter- and Intraspecific Variation in Free-Ranging Populations

AU - Brigham, R

AU - McKechnie, A

AU - Doucette, Lisa

AU - Geiser, F

PY - 2012

Y1 - 2012

N2 - Caprimulgid birds represent one of the best studied endotherm taxa in terms of the occurrence of heterothermy in free-ranging populations. In this chapter, we review currently available data on heterothermy in this group, and examine potential ecological correlates of these responses. To date, heterothermic responses have been examined in at least one population of each of six species, ranging in body mass (Mb) from 40 to 450 g and occurring in habitats from deserts to mesic woodlands. Patterns of heterothermy vary from infrequent, shallow bouts to periods of uninterrupted torpor lasting several days, during which body temperature may be reduced below 5C. Overall levels of heterothermy, as quantified using a recently proposed metric, do not show statistically significant relationships with Mb nor with ecological variables such as minimum air temperature or habitat aridity. Nevertheless, it is striking that the two most heterothermic species recorded to date, the Common Poorwill and the Freckled Nightjar, both inhabit arid habitats. Moreover, the former species remains the only bird known to hibernate. Within species, patterns of heterothermy may vary considerably among populations, with lunar cycles, temporal fluctuations in insect abundance and roost site characteristics being among the ecological determinants of heterothermy.

AB - Caprimulgid birds represent one of the best studied endotherm taxa in terms of the occurrence of heterothermy in free-ranging populations. In this chapter, we review currently available data on heterothermy in this group, and examine potential ecological correlates of these responses. To date, heterothermic responses have been examined in at least one population of each of six species, ranging in body mass (Mb) from 40 to 450 g and occurring in habitats from deserts to mesic woodlands. Patterns of heterothermy vary from infrequent, shallow bouts to periods of uninterrupted torpor lasting several days, during which body temperature may be reduced below 5C. Overall levels of heterothermy, as quantified using a recently proposed metric, do not show statistically significant relationships with Mb nor with ecological variables such as minimum air temperature or habitat aridity. Nevertheless, it is striking that the two most heterothermic species recorded to date, the Common Poorwill and the Freckled Nightjar, both inhabit arid habitats. Moreover, the former species remains the only bird known to hibernate. Within species, patterns of heterothermy may vary considerably among populations, with lunar cycles, temporal fluctuations in insect abundance and roost site characteristics being among the ecological determinants of heterothermy.

M3 - Chapter

SN - 9783642286780

SP - 175

EP - 187

BT - Living in a Seasonal World

A2 - Ruf, Thomas

A2 - Bieber, Claudia

A2 - Arnold, Walter

A2 - Millesi, Eva

PB - Springer Verlag

CY - Germany

ER -

Brigham R, McKechnie A, Doucette L, Geiser F. Heterothermy in Caprimulgid Birds: A Review of Inter- and Intraspecific Variation in Free-Ranging Populations. In Ruf T, Bieber C, Arnold W, Millesi E, editors, Living in a Seasonal World. Germany: Springer Verlag. 2012. p. 175-187