scholarly journals Evaluation of Accuracy and Precision of the Sound-Recorder-Based Point-Counts Applied in Forests and Open Areas in Two Locations Situated in a Temperate and Tropical Regions

Birds ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 351-361
Author(s):  
Michał Budka ◽  
Kinga Kułaga ◽  
Tomasz Osiejuk
Keyword(s):  
Habitat Type ◽  
Time Of Day ◽  
Tropical Regions ◽  
Point Count ◽  
Point Counts ◽  
Bird Populations ◽  
Count Method ◽  
Accuracy And Precision ◽  
Geographical Regions ◽  
Point Count Method

The point-count method is one of the most popular techniques for surveying birds. However, the accuracy and precision of this method may vary across various environments and geographical regions. We conducted sound-recorder-based point-counts to examine the accuracy and precision of the method for bird biodiversity estimation as a function of geographical region, habitat type and the time of day at which the survey began. In temperate (Poland) and tropical (Cameroon) regions, we recorded soundscapes on two successive mornings at 36 recording sites (18 in each location). At each site, we analyzed three 5-min surveys per day. We found no differences in the accuracy and precision of the method between regions and habitats. The accuracy was significantly greater at sunrise than during later surveys. The similarity of the bird assemblages detected by different surveys did not differ between regions or habitats. However, the bird communities described at the same time of day were significantly more similar to each other than those detected by surveys conducted at different times. The point-count method provided statistically indistinguishable estimates of bird biodiversity in different geographical regions and habitats. However, our results highlight two weaknesses of the method: low accuracy (41–54%), which limits the usefulness of a single survey in understanding bird–environment relationships, and changes in accuracy throughout the day, which may result in the misinterpretation of the status of bird populations.

scholarly journals Detectability of Non-passerines Using "Pishing" in Eastern Ontario Woodlands

2005 ◽  
Vol 119 (3) ◽  
pp. 377 ◽  
Author(s):  
J. Ryan Zimmerling
Keyword(s):  
Species Richness ◽  
Continuous Series ◽  
Point Count ◽  
Point Counts ◽  
Passerine Species ◽  
Count Method ◽  
Eastern Ontario ◽  
Presence And Absence ◽  
Point Count Method

During spring and summer 1997, non-passerines were surveyed in three woodlots near Arnprior, Ontario, using standard point counts, and standard point counts combined with “pishing” (pishing involves the observer saying the words “pish pish pish pish” in a continuous series of short bursts). Of the 27 non-passerine species detected, 22 were recorded on more days using pishing as opposed to the standard point count method. However, only three of these species were recorded on significantly more days using pishing. Several woodpecker species approached more closely during point counts with pishing, which facilitated identification. In contrast, raptors and some other non-passerines that may have otherwise gone unnoticed were identified as they fled from the pishing sound. Hence, when the overall goal of research is to detect species richness or to gather presence and absence data in woodlands, point counts combined with pishing may increase detectability of some non-passerines.

scholarly journals On the use of 10-minute point counts and 10-species lists for surveying birds in lowland Atlantic Forests in southeastern Brazil

2012 ◽  
Vol 52 (28) ◽  
pp. 333-340 ◽  
Author(s):  
Vagner Cavarzere ◽  
Thiago Vernaschi Vieira da Costa ◽  
Luís Fábio Silveira
Keyword(s):  
Rapid Assessment ◽  
Southeastern Brazil ◽  
Point Counting ◽  
Point Count ◽  
Point Counts ◽  
Time Period ◽  
Minute Point ◽  
Species Lists ◽  
Point Count Method ◽  
Breeding Seasons

Due to rapid and continuous deforestation, recent bird surveys in the Atlantic Forest are following rapid assessment programs to accumulate significant amounts of data during short periods of time. During this study, two surveying methods were used to evaluate which technique rapidly accumulated most species (> 90% of the estimated empirical value) at lowland Atlantic Forests in the state of São Paulo, southeastern Brazil. Birds were counted during the 2008-2010 breeding seasons using 10-minute point counts and 10-species lists. Overall, point counting detected as many species as lists (79 vs. 83, respectively), and 88 points (14.7 h) detected 90% of the estimated species richness. Forty-one lists were insufficient to detect 90% of all species. However, lists accumulated species faster in a shorter time period, probably due to the nature of the point count method in which species detected while moving between points are not considered. Rapid assessment programs in these forests will rapidly detect more species using 10-species lists. Both methods shared 63% of all forest species, but this may be due to spatial and temporal mismatch between samplings of each method.

scholarly journals KEANEKARAGAMAN JENIS BURUNG DI KAWASAN HUTAN LINDUNG GUNUNG SIRIMAU

2017 ◽  
Vol 1 (3) ◽  
pp. 247
Author(s):  
John F. Sahusilawane
Keyword(s):  
Bird Species ◽  
Bird Diversity ◽  
Mountain Forests ◽  
Point Count ◽  
Red Eye ◽  
Count Method ◽  
Protected Forests ◽  
Point Count Method ◽  
Habitat Variables

This study was conducted to determine the composition of bird diversity and vegetation stages and composition, to determine the variables that most influence the diversity of birds in protected forests Sirimau, This study was conducted for three months from September 2015 to November 2015. Bird observations and habitat variables performed using the Point Count method, and found thirty observation points at each location, with 30 cm trellis and 200 m plot distance. The analysis of birds and vegetation in Sirimau mountain forests shows that, bird species are dominated by Red Eye (Aplonis Motalica), and more than 50 species of vegetation exist in the research location, dominated by fruits.  

scholarly journals A Fixed-radius Point Count Method for Nonbreeding and Breeding Season Use

The Auk ◽  
1986 ◽  
Vol 103 (3) ◽  
pp. 593-602 ◽  
Author(s):  
Richard L. Hutto ◽  
Sandra M. Pletschet ◽  
Paul Hendricks
Keyword(s):  
Bird Species ◽  
Common Species ◽  
Bird Abundance ◽  
Point Count ◽  
Bird Density ◽  
Count Method ◽  
Species Abundances ◽  
Fixed Radius ◽  
Point Count Method ◽  
A Site

Abstract We provide a detailed description of a fixed-radius point count method that carries fewer assumptions than most of the currently popular methods of estimating bird density and that can be used during both the nonbreeding and breeding seasons. The method results in three indices of bird abundance, any of which can be used to test for differences in community composition among sites, or for differences in the abundance of a given bird species among sites. These indices are (1) the mean number of detections within 25 m of the observer, (2) the frequency of detections within 25 m of the observer, and (3) the frequency of detections regardless of distance from the observer. The overall ranking of species abundances from a site is similar among the three indices, but discrepancies occur with either rare species that are highly detectable at great distances or common species that are repulsed by, or inconspicuous when near, the observer. We argue that differences in the behavior among species will preclude an accurate ranking of species by abundance through use of this or any other counting method in current use.

APPLICATION OF THE POINT-COUNT METHOD TO PROBLEMS OF SOIL MORPHOLOGY

Soil Science ◽  
1968 ◽  
Vol 106 (2) ◽  
pp. 149-152 ◽  
Author(s):  
R. B. DANIELS ◽  
E. E. GAMBLE ◽  
L. J. BARTELLI ◽  
L. A. NELSON
Keyword(s):  
Soil Morphology ◽  
Point Count ◽  
Count Method ◽  
Point Count Method

scholarly journals Patterns of Species Richness and Abundance in Badingilo National Park in South Sudan

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Thomas Francis Lado ◽  
David Gwolo Phanuel Mogga ◽  
Richard Angelo Lado Benjamin
Keyword(s):  
Species Richness ◽  
National Park ◽  
Habitat Type ◽  
Bird Species ◽  
Abundant Species ◽  
Point Count ◽  
Number Of Species ◽  
Riverine Habitat ◽  
Species Richness And Abundance ◽  
Point Count Method

The study was carried out to determine patterns of birds’ species richness, alpha and beta diversities; and abundance in Badingilo national park using a 10 m fixed-radius point count method. A total of 2670 individuals were recorded from 182 points in the park. The highest expected number of species (Jack1 estimator) was observed in the Riverine habitat and least was in the Agriculture and Human settlement habitat type. The total number of species observed in the park was 63; however Jack1 estimator indicated that there were 68 species in the park. The majority of the birds observed during the study were resident species, few migratory and Palaearctic bird species. Few birds observed in the park were abundant. The most abundant species was the village weaver (381 individuals), and the rarest species were black-bellied bustard, barn owl, black scimitar bill and tree pipit (one individual each).

scholarly journals Spesies Burung pada Beberapa Tipe Habitat di Kecamatan Lhoknga Kabupaten Aceh Besar

2017 ◽  
Vol 4 (1) ◽  
pp. 15
Author(s):  
Samsul Kamal ◽  
Elita Agustina ◽  
Zahratur Rahmi
Keyword(s):  
Bird Species ◽  
Point Count ◽  
Count Method ◽  
Line Transects ◽  
Point Count Method

Lhoknga subdistrict is an area that has a habitat for many species of fauna, including birds. References about species of birds in some habitats are still very limited. Therefore, it is necessary to make a research on bird species in several types of habitat in the district of Lhoknga. The aim of the research is to figure out birds species in several types of habitats in the Lhoknga subdistrict. The data were collected by using the point count method and line transects. The results showed that there were 39 species of birds from 21 families found in Lhoknga district. Based on the PP. No. 07 of 1999, it was found that there were 14 species of protected birds in Lhoknga subdistrict.

scholarly journals Birds of Barandabhar Corridor Forest, Chitwan, Nepal

2021 ◽  
Vol 13 (11) ◽  
pp. 19509-19526
Author(s):  
Saneer Lamichhane ◽  
Babu Ram Lamichhane ◽  
Kapil Pokharel ◽  
Pramod Raj Regmi ◽  
Tulasi Prasad Dahal ◽  
...  
Keyword(s):  
Habitat Type ◽  
Bird Species ◽  
Wetland Birds ◽  
Species List ◽  
Point Count ◽  
Reference Guide ◽  
Point Count Method ◽  
Time Frames ◽  
Bird List

Long term monitoring of bird species was conducted in Barandabhar Corridor Forest, one of the important bird areas of Nepal (IBA). Bird species were identified by the point count method in transect surveys in two-time frames from 2002–2012 and 2015–2016 to obtain the bird species list. We compared our bird list with previously published (after 2000) checklists and compiled the updated checklist of birds of Barandabhar Corridor Forest. We documented 372 bird species belonging to 80 families in Barandabhar, including five Critically Endangered, three Endangered, eight Vulnerable, and 15 Near Threatened species. The Accipitridae family included the highest number of species (n= 32), followed by Muscicapidae (n= 30) and Anatidae (n= 18). Approximately, half of the total confirmed bird species were insectivorous. The list included 63% resident, 27% winter migratory, 7.5% summer migratory, and 2.9% passage migrant species. According to the habitat type, there were 181 species of forest, 74 species of wetland, 24 species of grassland, 70 species of open field, and 23 species of partially wetland birds. This updated checklist of bird species will serve as a reference guide for bird watchers, biodiversity researchers, and support managers for conservation effort; and can be used to track any changes in the composition of bird species in the future.

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