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Moving towards acceleration for estimates of activity-specific metabolic rate in free-living animals: the case of the cormorant.
TLDR
In free-living imperial cormorants, ODBA, and hence estimated VO2, was higher during the return flight of a foraging bout, and decreased with depth during the descent phase of a dive, supporting the use of accelerometry for the determination of activity-specific rate of energy expenditure.
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Basal metabolic rate of birds is associated with habitat temperature and precipitation, not primary productivity
TLDR
To assess the relationship between environmental characteristics and metabolic rate in birds, collated BMR measurements for 92 populations representing 90 wild-caught species and examined the relationships between BMR and NPP, Ta, annual temperature range, precipitation and intra-annual coefficient of variation of precipitation (PCV).
View on Royal Society
The eye of a passeriform bird, the European starling (Sturnus vulgaris): eye movement amplitude, visual fields and schematic optics
  • G. Martin
  • Biology
    Journal of Comparative Physiology A
  • 1 July 1986
TLDR
There is evidence that the starling eye may embody a ‘ramp’ retina as a static accommodatory device which could facilitate the simultaneous detection of both close prey and distant predators.
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Understanding bird collisions with man-made objects: a sensory ecology approach
TLDR
A sensory ecology framework is used here to assess why flying birds collide with prominent structures, such as power lines, fences, communication masts, wind turbines and buildings, which intrude into the open airspace.
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Visual fields and their functions in birds
  • G. Martin
  • Biology
    Journal of Ornithology
  • 5 September 2007
Among birds there are considerable interspecific differences in all aspects of visual fields. However, it is hypothesised that the topography of the frontal binocular portion of fields are of only…
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What is binocular vision for? A birds' eye view.
  • G. Martin
  • Biology
    Journal of vision
  • 1 October 2009
It is proposed that with the possible exception of owls, binocularity in birds does not have a higher order function that results in the perception of solidity and relative depth. Rather,…
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Kiwi Forego Vision in the Guidance of Their Nocturnal Activities
TLDR
It is proposed that the Kiwi visual system has undergone adaptive regressive evolution driven by the trade-off between the relatively low rate of gain of visual information that is possible at low light levels, and the metabolic costs of extracting that information.
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Visual pigments and colour vision in a nocturnal bird, Strix aluco (tawny owl)
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An owl's eye: Schematic optics and visual performance inStrix aluco L.
  • G. Martin
  • Biology
    Journal of comparative physiology
  • 1 September 1982
TLDR
The schematic eye ofrix aluco, a nocturnal owl species, is described and it is concluded that the essentially ‘nocturnal’ feature of the owl eye does not lie in either its light gathering power or the sensitivity of individual rod receptors.
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Novel area serving binocular vision in the retinae of procellariiform seabirds.
TLDR
The retinal ganglion cells in five pelagic seabirds were examined and a well-defined region in the dorsotemporal retina, close to the ora, was identified, and it is suggested that the region containing these cells should be regarded as a retinal area, and the name giganto cellularis is proposed.
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