Articles by Author: Ct Downs

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  1. Numbers and distribution of the Great White Pelican Pelecanus onocrotalus and the Pink-backed Pelican P. rufescens in north-eastern KwaZulu-Natal, South Africa

    Numbers and distribution of the Great White Pelican Pelecanus onocrotalus and the Pink-backed Pelican P. rufescens in north-eastern KwaZulu-Natal, South Africa

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    KwaZulu-Natal (KZN), South Africa, is the most southerly area in Africa in which the Pink-backed Pelican Pelecanus rufescens breeds. This area also boasts the most southerly breeding colony on the eastern seaboard of Africa for the Great White Pelican P...
  2. Ground cavity nest temperatures and their relevance to Blue Swallow <em>Hirundo atrocaerulea</em> conservation

    Ground cavity nest temperatures and their relevance to Blue Swallow <em>Hirundo atrocaerulea</em> conservation

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Blue Swallows Hirundo atrocaerulea are Critically Endangered within South Africa. They nest in natural underground holes in mist-belt grasslands. Temperature dataloggers were used to record ground cavity nest (Tn) and ambient temperature (Ta) for one artificial and 11 natural Blue...
  3. South Africa's coastal-breeding white-breasted cormorants: population trends, breeding season and movements, and diet

    South Africa's coastal-breeding white-breasted cormorants: population trends, breeding season and movements, and diet

    Item type: Journal Article • Journal: African Journal of Marine Science
    White-breasted cormorants Phalacrocorax [carbo] lucidus breed around South Africa's coast and at inland localities. Along the coasts of the Northern, Western and Eastern Cape provinces, numbers breeding were similar during the periods 1977–1981 (1 116 pairs at 41 localities) and...
  4. Breeding incidence of the Great White Pelican <em>Pelecanus onocrotalus</em> and the Pink-backed Pelican <em>P. rufescens</em> in south-eastern Africa from 1933 to 2005

    Breeding incidence of the Great White Pelican <em>Pelecanus onocrotalus</em> and the Pink-backed Pelican <em>P. rufescens</em> in south-eastern Africa from 1933 to 2005

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    The Great White Pelican Pelecanus onocrotalus and the Pink-backed Pelican P. rufescens are flagship species for the Greater St Lucia Wetland Park, north-eastern KwaZulu-Natal, South Africa. The traditional breeding sites for the Great White Pelican and the Pink-backed Pelican are...
  5. Is commercial <em>Protea</em> farming causing a change in the seasonal range of Gurney's Sugarbird <em>Promerops gurneyi</em> in the KwaZulu-Natal Midlands, South Africa?

    Is commercial <em>Protea</em> farming causing a change in the seasonal range of Gurney's Sugarbird <em>Promerops gurneyi</em> in the KwaZulu-Natal Midlands, South Africa?

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Species worldwide are threatened due to various factors including habitat transformation and degradation. The Gurney's Sugarbird Promerops gurneyi is a bird species endemic to southern Africa. It is a nectarivorous species that is highly dependent on Protea woodland areas in...
  6. Aspects of diet choice and digestion in the Dark-capped Bulbul <em>Pycnonotus barbatus</em>

    Aspects of diet choice and digestion in the Dark-capped Bulbul <em>Pycnonotus barbatus</em>

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    Most avian frugivores are not specialised and feed on a variety of fruit that are generally nutrient dilute. Little is known about avian frugivores that supplement their diets with insects as a nutrient source. Although considered a frugivore, the Dark-capped...
  7. Development and functional significance of dorsal air bags in nestlings of Monteiro's Hornbill <em>Tockus monteiri</em>

    Development and functional significance of dorsal air bags in nestlings of Monteiro's Hornbill <em>Tockus monteiri</em>

    Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology
    This study describes the morphology and investigates the possible function of the air bags found on the nestlings of Monteiro's Hornbill Tockus monteiri. These air bags increased in size with age and mass of the nestling until 14 d of...