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Showing 1 to 15 of 15 for “"larks"”.
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The phylogenetics and evolution of Africa's Larks (Alaudidae)
The larks are a group of dull coloured birds that are conservative in plumage coloration and pattern due to the requirements for camouflage in open habitats. Because many species inhabit structurally similar habitats the group is also characterised by a great deal of morphological convergence. …
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The phylogenetics and evolution of Africa's Larks (Alaudidae)
The larks are a group of dull coloured birds that are conservative in plumage coloration and pattern due to the requirements for camouflage in open habitats. Because many species inhabit structurally similar habitats the group is also characterised by a great deal of morphological convergence. …
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The phylogenetics and evolution of Africa's larks (Alaudidae)
The larks are a group of dull coloured birds that are conservative in plumage coloration and pattern due to the requirements for camouflage in open habitats. Because many species inhabit structurally similar habitats the group is also characterised by a great deal of morphological convergence. …
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Life on the edge: do body size and drinking dependency influence how birds deal with the heat in South Africa's most extreme desert?
… these lark species drink surface water (drinking larks; Red-capped and Large-billed Lark) and two do not (non-drinking larks; Spike-heeled and Karoo Lark). I also collected data on other passerines present in the Tankwa Karoo for comparison to the larks. Black bulb thermometers were used to …
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Non-Game Bird habitat Associated With Haul Roads and Surface Mining for Bentonite Clay
… of strip mined areas are given. Horned larks (Eremophila alpestres) was the only species observed during the 1977 winter survey within the old spoils, new spoils and unmined areas. Highest horned lark density occurred in new spoils. Horned larks, common redpolls (Acanthis flammea) and …
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Efficiency of Two Black-tailed Prairie Dog Rodenticides and Their Impacts on Non-target Bird Species
… and impact (short-term and long-term) on horned larks (Eromophila alpestrus) and other seed-eating birds of the prairie dog colonies were evaluated. Prairie dog burrow densities ranged from 54-187 burrows/ha with an average burrow density of 114 ±8 (± SE) burrows/ha. Rodenticide short-term …
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Historical Genetic Analysis Of Horned Lark (Eremophila Alpestris) Specimens From The Prairie Pothole Region
… study aims to genetically characterize Horned Larks from the North Dakota region using the mtDNA NADH dehydrogenase subunit 2 (ND2) gene. Horned Larks were sampled from museum collections, with ages ranging from 13 - 120 years old. 5mm x 1mm feather cuttings were removed using a non-invasive …
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The decline of the globally threatened Rudd's Lark in one of its last remaining core sites, the Wakkerstroom grasslands
… I found both absolute lower numbers of Rudd's Larks (5 transects with Rudd's Lark present down from 9 in 2002; 9 individuals down from 32), and a lower probability of encounter (significantly lower in the case of individuals). Seven transects had been lost to crop production, two of which …
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Where birds are rare or fill the air : the protection of the endemic and the nomadic avifaunas of the Karoo
… have an unusually high species richness of larks (Alaudidae) compared with other biomes. The Succulent and Nama-Karoo have stochastically low annual rainfall and generally low above-ground primary production. Rainfall is often highly localized and varies annually in amount and timing. The …
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Population dynamics and population genetics of the Critically Endangered Raso lark: implications for conservation
… resolving a node on the phylogenetic tree of all larks that the study by Alström et al. (2013) was unable to resolve. My RADseq results indicate that the Raso lark and the skylark are sister species, and that the Oriental lark is likely to be a subpopulation, or maybe a subspecies, of the skylark. …
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Landscape Fragmentation and Grassland Patch Size Effects on Non-game Grassland Birds in Xeric Mixed-grass Prairies of Western South Dakota
… these were: grasshopper sparrows, western meadowlarks, brown-headed cowbirds, chestnut-collared longspurs, bobolinks and red-winged blackbirds. Grasshopper sparrows and western meadowlarks were observed in >99% of grassland patches. Avian community composition was affected by landscape …
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Handling the heat: keeping water available for birds of the Tankwa Karoo Desert
… part by two common species: Grey-backed Sparrow-larks Eremopterix verticalis and Tractrac Chats Emarginata tractrac. Two species (Cape Sparrows Passer melanurus and White-throated Canaries Crithagra albogularis) responded negatively to the provision of shade. There was an observed shift in bird …
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Effects of Grazing Intensity and Temporal Application of Grazing Treatments on Nongame Birds in North Dakota Mixed-Grass Prairie
… densities of chestnut-collared longspurs, horned larks, and various species of shorebirds were highest in the high and extreme grazing treatment plots. Nongame bird densities and species richness during this study period were lower for all grazing treatments in native prairie and CRP grazing …
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Sagebrush Steppe Habitats and Their Associated Bird Species in South Dakota, North Dakota, and Wyoming: Life on the Edge of the Sagebrush Ecosystem
… shrubs and sagebrush in the buffers and Horned Larks which were absent when there were more hayfields in the buffer. Fifty-percent habitat occupancy models were developed for the six most abundant bird species, and all of the models accurately predicted the occurrence and non-occurrence of these …
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Land use and breeding ecology of a renosterveld endemic bird: the Agulhas Long-billed Lark Certhilauda brevirostris
… 2020 and January 2022. Agulhas Long-billed Larks were recorded at 58% (n=204) of 351 counts. Occupancy models were used to determine how detection was related to survey variables (temperature, wind speed and start time). Occupancy was then modelled against site variables (percentage …