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Article
H. D. Jackson, Auteur
Article
H. D. Jackson, Auteur
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H. D. Jackson, Auteur ; C. Spottiswoode, AuteurNocturnal trapping and ringing of swallows around Harare, Zimbabwe, showed that at least five species have adapted their breeding behaviour to manmade road culverts, none more so than the Red-breasted Swallow, Hirundo semirufa, which may be foun[...]
Article
H. D. Jackson, Auteur
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H. D. Jackson, Auteur ; J. Ingels, AuteurDans Ostrich (81(2) 2010)The Freckled Nightjar Caprimulgus tristigma and the Blackish Nightjar C. nigrescens are widespread and common within their rupicolous habitat, in the Afrotropics and Neotropics respectively, and may therefore be considered as successful in their[...]
Article
H. D. Jackson, Auteur
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H. D. Jackson, AuteurUse of a night-vision telescope, with a Pocket Memo for recording a running commentary, allowed the courtship displays of a male Pennant-winged Nightjar, Semeiophorus vexillarius, near the Muneni River (18degrees59'S, 32degrees41'E, 1000m), Zimb[...]
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H. D. Jackson, AuteurA synthesis of 722 published and unpublished records of nightjar stomach contents from Afrotropical specimens was undertaken. Coleoptera were found in 84.6% of the stomachs, often in substantial numbers, beetles providing these birds with their [...]
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H. D. Jackson, AuteurAnalysis of the stomach contents of 282 nightjars (Caprimulgidae) collected in Zimbabwe showed that the seven species concerned feed almost exclusively on nocturnal flying insects, predominantly on beetles (Coleoptera, 52.7%), especially lamelli[...]
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H. D. Jackson, Auteur
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H. D. Jackson, AuteurA collection of 96 nightjars, representing six species, were taken in Zimbabwe during the first half of January, which is a major part of their post-breeding moult period, to provide extensive data on their patterns and sequences of moult. It wa[...]
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H. D. Jackson, AuteurA new dichotomous key to the identification of the Afrotropical nightjars, based mainly on mensural characters, is presented. This replaces the author's 1984 key to the nightjar species of Africa and Its islands, which has been revised to incorp[...]
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H. D. Jackson, Auteur
Article
H. D. Jackson, Auteur
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H. D. Jackson, AuteurAfrotropical nightjars have evolved a number of adaptations that enable them to cope well with various natural mortality factors facing them. They are however; extremely vulnerable to the many human factors that affect their lives: Three areas o[...]
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H. D. Jackson, AuteurI undertook a review of evidence for the translocation of eggs and young by nightjars through a comprehensive search of the literature. I found that most of the evidence was based on hearsay, supposition, a misunderstanding of nightjar behaviour[...]
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H. D. Jackson, AuteurNightjars (Caprimulgidae) in the Afrotropical Region feed almost exclusively on night flying insects, which they hunt during twilight and moonlight. Without the benefit of echolocation, they detect prey visually before pursuing and capturing it [...]
Article
H. D. Jackson, Auteur
