Migration by flapping or soaring: flight strategies of Marsh, Montagu's and Pallid Harriers in Southern Israel

Article Abstract:

A study on migration by flapping or soaring was conducted to test flight theory predictions. The study observed flight strategies used by Marsh, Montagu's and Pallid Harriers in Southern Israel. Results reveal that Marsh Harriers reacted to different thermal conditions by changing their gliding airspeed. Meanwhile, smaller birds like Montagu's and Pallid Harriers did not adopt gliding airspeeds. It was concluded that soaring-gliding flight for smaller harriers involves the efficient combination of different flight styles.

Harriers, Harriers (Birds), Gliding and soaring

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Absence of locomotor-respiratory coupling during simulated descending flight in the cackling Canada goose

Article Abstract:

Locomotor-respiratory coupling in birds occurs during flight and in mammals during locomotion. Various coupling ratios in birds have been shown, although mammals usually have a locomotor-respiratory frequency ratio of 1:1. A new study examines the occurrence of locomotor-respiratory coupling during descending flight in cackling Canada geese. It is concluded that the short duration of descending flight means there is little energetic significance in the absence of locomotor-respiratory coupling.

Physiological regulation, Canada goose, Respiration, Locomotion

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Foraging strategies and energetic costs of foraging flights by breeding Wood Storks

Article Abstract:

A study of the foraging strategies employed by 269 Wood Storks revealed their preference for straight flying paths in travelling to foraging sites in the vicinity of their colonies. Energy consumption in these birds remained stable, despite their usage of energetically conservative soaring flight in covering longer foraging distances at the end of their breeding season.

Energy metabolism, Bioenergetics, Wood stork, Wood storks

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