scholarly journals Temperate migrants and resident bird species in Afro-tropical savannahs show similar levels of ecological generalism

Ibis ◽  
2016 ◽  
Vol 158 (3) ◽  
pp. 496-505 ◽  
Author(s):  
Sam T. Ivande ◽  
Will Cresswell
Keyword(s):  
Bird Species ◽  
Resident Bird

scholarly journals Efecto de la estacionalidad y lluvias en la avifauna del Chaco Serrano Austral, Argentina

2017 ◽  
Vol 65 (3) ◽  
pp. 953
Author(s):  
Gustavo Alfredo Fava ◽  
Juan Carlos Acosta ◽  
Graciela Mirta Blanco
Keyword(s):  
Bird Species ◽  
Reproductive Activity ◽  
Breeding Habitat ◽  
Bird Abundance ◽  
Group Management ◽  
Natural Park ◽  
Chaco Serrano ◽  
Site Survey ◽  
Migrant Bird ◽  
Resident Bird

In subtropical regions like the Chaco Serrano (33° S), rainfall has a marked seasonality, and water flood, caused by heavy rains, may have important consequences for dependent ecosystems. Conversely, the high pressure on available resources during dry periods can also affect the fauna diversity and distribution. Even though birds have shown to be excellent ecological indicators of these shifts in the environment, currently little is known about the avifauna of the Argentine Chaco Serrano phytogeographic district. Our aim was to study the resident bird population status in the Southern Chaco Serrano, its fluctuations in richness and abundance, and its relationship to seasonal variations, in monthly and annual hydroperiods. In order to assess the resident bird status over a two year period (2011 Mar.-2013 Feb.) we carried out 18 sampling surveys during pre-breeding (spring), breeding (summer) and non breeding periods (autumn-winter), in the Northeastern part of the Valle Fértil Natural Park, San Juan province, Argentina. During each site survey, we recorded bird assemblages found in six transects, and obtained bird abundance and species diversity. A mixed general linear model was employed to evaluate relationships between the studied variables. We found a total of 98 species of birds belonging to 33 families (44 resident species, 23 spring visitors, six summer visitors, two winter visitors and 23 with scarce registers). We also registered 68 of these species in both hydroperiods, 28 only during rainy periods and only two during the dry period. Both richness and abundance showed the highest values during the pre-breeding and rainy seasons, while different tendencies were detected during the isolated monthly rainfalls. These changes in bird densities were associated with the arrival of migratory species, mainly spring visitors, and probably in relationship with their reproductive activity, and to seasonal fluctuations in food resources. The Southern Chaco Serrano is a subtropical semiarid place that seems to be an important breeding habitat for many migrant bird species, which in turn promoted seasonal changes in species density and diversity, mainly during rainy years. This work contributed to our understanding on the causes of richness and abundance variations on birds, and will contribute to this important group management and conservation in this area.

Plasticity and Stereotypy in Avian Foraging during Secondary Succession in Temperate Forests

2016 ◽  
Vol 9 (3) ◽  
pp. 174-194 ◽  
Author(s):  
Merrilyn Serong ◽  
Alan Lill
Keyword(s):  
Anthropogenic Disturbance ◽  
Secondary Succession ◽  
Foraging Behaviour ◽  
Bird Species ◽  
Timber Harvesting ◽  
Eucalyptus Regnans ◽  
Mountain Ash ◽  
Bird Species Diversity ◽  
Resident Bird ◽  
Chronosequence Approach

Some bird species cannot persist during early secondary succession after natural or anthropogenic disturbance of Australian Mountain Ash ( Eucalyptus regnans) forest, whilst others remain abundant throughout regeneration. To conserve bird species diversity optimally in such forests, we need to know, inter alia, exactly why the latter species can persist after disturbance. Using a chronosequence approach, we documented four facets of foraging in a suite of these persistent species effectively covering 100 years of succession in E. regnans forest disturbed by wildfire or timber harvesting, namely the foraging strata, locations, substrates and behaviours used. Most species showed plasticity in their use of foraging strata and locations during succession, but four exhibited some limited stereotypy in these facets. In contrast, use of foraging substrates and behaviours was largely invariant within species during secondary succession. We suggest that switching foraging strata and locations was probably critical to persistence of most of these bird species during secondary succession, given the marked variation in structural and floristic variables that characterises this regeneration process. Some plasticity in foraging behaviour repertoire and substrate use was probably possible, but not beneficial. Although some resident bird species’ populations were severely reduced by disturbance in these forests, a substantial subset of species was sufficiently flexible in choosing foraging microhabitats to persist throughout secondary succession at pre-disturbance abundances.

scholarly journals Suitability of open digital species records for assessing biodiversity patterns in cities: a case study using avian records

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Marufa Sultana ◽  
Ilse Storch
Keyword(s):  
Urban Areas ◽  
Bird Species ◽  
Grid Cell ◽  
Digital Data ◽  
Linear Regression Models ◽  
Biodiversity Patterns ◽  
Case Examples ◽  
Online Platforms ◽  
Bird Richness ◽  
Resident Bird

Abstract Openly available species observation records on various online platforms achieve good coverage in urban areas. Thus, such digital data could provide a basis for biodiversity assessments in cities. Here, we investigated suitability of open digital species occurrence data, compared with systematically field surveyed data, in Freiburg, Germany (a Western city) and Dhaka, Bangladesh (a global-South city). We focused on resident bird species richness as an indicator of local biodiversity. We collected avian records for urban areas from ‘ornitho.de’ in Freiburg and ‘gbif.org’ in Dhaka. Additionally, we conducted point count surveys at several urban locations in both cities. Using these records, we prepared three grid (cell size 250 m × 250 m) based datasets—open digital dataset (i.e. records compiled from well-surveyed grid cells), field surveyed dataset (i.e. records of systematic bird surveys) and combined dataset (i.e. digital data and field data combined). We compared the relationship of resident bird richness with different habitat factors by applying linear regression models, separately using each of the three datasets. We assessed suitability of data from online platforms by comparing the variables retained after model selection based on digital data versus field surveyed data. We found that field surveyed data and combined data did not alter general understanding of the key driving factors of bird richness patterns we obtained from open digital data. This held for both case examples, Freiburg vs. Dhaka, respectively. This suggests that open digital data from well-surveyed urban locations can provide a suitable basis to assess drivers of biodiversity patterns within cities.

scholarly journals Survival and population size of a resident bird species are declining as temperature increases

2011 ◽  
Vol 81 (2) ◽  
pp. 352-363 ◽  
Author(s):  
Leonard Santisteban ◽  
Craig W. Benkman ◽  
Trevor Fetz ◽  
Julie W. Smith
Keyword(s):  
Population Size ◽  
Bird Species ◽  
Resident Bird

scholarly journals Birds observed during the monitoring period of 2013-2017 in the revegetation area of ex-coal mining sites in South Kalimantan, Indonesia

2018 ◽  
Vol 19 (1) ◽  
pp. 323-329 ◽  
Author(s):  
MOCHAMAD ARIEF SOENDJOTO ◽  
MAULANA KHALID RIEFANI ◽  
DIDIK TRIWIBOWO ◽  
DEWI METASARI
Keyword(s):  
Coal Mining ◽  
Bird Species ◽  
Mine Site ◽  
Monitoring Period ◽  
Mining Sites ◽  
Additional Site ◽  
House Martin ◽  
The Given ◽  
Resident Bird ◽  
Observation Path

Soendjoto MA, Riefani MK, Triwibowo D, Metasari D. 2018. Birds observed during the monitoring period of 2013-2017 in the revegetation area of ex-coal mining sites in South Kalimantan, Indonesia. Biodiversitas 19: 323-329. The number of bird species in the reclaimed and revegetated ex-mine site increases as the vegetation age increases. To test the hypotheses, the number of bird species was recorded at 08.00-12.00 and 14.00-17.00, 6-8 days for eight consecutive semiannual monitorings of 2013-2017 in four revegetation sites. Since the second half of 2015, another revegetation site, namely BP was added. Bird species were recorded in 25 m right side and 25 m left side of the observation path and within a radius of 25 m of observation points. To show an increase in the number of bird species, the number of newly discovered bird species in the given semiannual monitoring was added to the number of bird species in the previous semiannual monitoring. The number of bird species in the early semiannual monitoring was used as the baseline value. A bird species was categorized as a resident if the species was observed in each monitoring in the four vegetated sites. Up to the last monitoring, 53 bird species were recorded in the first four sites and 70 bird species in five sites (four reclamation and revegetation sites and one additional site, BP), while in the early semiannual monitoring (second half of 2013) birds recorded were only 30 species. This result shows that the older the vegetation age in the vegetated site, the greater the number of bird species utilizing the site. Seventeen species of birds were categorized as residents. These resident bird species includes White-breasted Woodswallow, Pied Triller, Scalybreasted Munia, Asian House-martin, Pacific Swallow, Long-tailed Shrike, Blue-throated Bee-eater, Olive-backed Sunbird, Sootyheaded Bulbul, Yellow-vented Bulbul, White-breasted Waterhen, Ashy Tailorbird, Yellow-bellied Prinia.

Complete Guide to Finding the Birds of Australia

2011 ◽  
Author(s):  
Richard Thomas ◽  
Sarah Thomas ◽  
David Andrew ◽  
Alan McBride
Keyword(s):  
Bird Species ◽  
Supplementary Information ◽  
Migratory Species ◽  
Endemic Birds ◽  
Australian Birds ◽  
Resident Bird

First published in 1994, The Complete Guide to Finding the Birds of Australia was the first ever book of its type in Australia – a complete guide to locating every resident bird species in Australia, plus supplementary information on where to find rarities, migratory species and logistical information. This fully revised second edition expands on the best-selling appeal of the first, describing the best-known sites for all of Australia’s endemic birds, plus vagrants and regular migrants such as seabirds and shorebirds. It covers all states and territories, and is the first guide to include all of Australia’s island and external territories. A comprehensive Bird Finder Guide details site information on all Australian bird species, and the authors provide valuable travel advice, including transport, climate and accommodation. Profusely illustrated with colour photographs of interesting, unique or unusual Australian birds, this book is a must-have for all birdwatchers living in Australia or visiting from overseas.

Population status and distribution of the critically endangered Indian Courser (Cursorius coromandelicus) on Delft Island, Sri Lanka

2021 ◽  
pp. 175815592110528
Author(s):  
Nitharsan Aloysius ◽  
Shashi Madhushanka ◽  
Chathuri Chandrika
Keyword(s):  
Sri Lanka ◽  
Bird Species ◽  
Critically Endangered ◽  
Feral Horses ◽  
Sampling Locations ◽  
Sampling Points ◽  
Minimum Number ◽  
Holistic Conservation ◽  
Number Of Individuals ◽  
Resident Bird

The critically endangered Indian Courser ( Cursorius coromandelicus) is a rare resident bird species in Sri Lanka. This bird species is restricted to the northern avifaunal region of Sri Lanka, and even there it has been recorded from only a few locations. Thus, it is identified as one of the rarest birds in Sri Lanka. A 1-year study was conducted to investigate Indian Courser population and their distribution within the Delft Island from 5th of January to 20th of December 2020. Ten (10) randomly selected points were investigated in this study. Of the 10 sampling points, the Indian Courser was observed within three (03) sampling points year around while several sightings were recorded in points 8, and 9 during 3 months of the year. Their abundance significantly varied among sampling locations (one-way ANOVA, F = 15.04, p < .05). The maximum number of individuals recorded was 18 ± 4.64 in December and the minimum number was 4 ± 4.64 during the non-migrant season. Although most of the area in the island is covered with dry grasslands, their distribution in Delft is largely confined to a few grassland patches where human activities are minimum. Hunting, egg collection, and trampling of their nest by the Delft ponies (feral horses) can be identified as the main threats of this species. It is of utmost importance to immediately implement holistic conservation measures to save this critically endangered bird as Delft is the only known location where a viable resident population of Indian Courser is found.

Sign in / Sign up

Export Citation Format

Share Document