Little Bustard (Tetrax tetrax)

2020 ◽  
Author(s):  
Nigel Collar ◽  
Ernest Garcia ◽  
Eduardo de Juana
Keyword(s):  
Tetrax Tetrax

Little Bustard (Tetrax tetrax Linnaeus, 1758) Number Observation on the Rostov Nature Reserve Grounds the Middle of 20th Century to 2020

2021 ◽  
pp. 113-121
Author(s):  
Victor A. Minoranskiy ◽  
Yulia V. Malinovskaya ◽  
Vasily I. Dankov ◽  
Sergey I. Kolesnikov
Keyword(s):  
Twentieth Century ◽  
Economic Activity ◽  
Nature Reserve ◽  
Positive Impact ◽  
Steppe Zone ◽  
Eastern European ◽  
Steppe Species ◽  
Animal Tracking ◽  
Number Of Factors ◽  
Tetrax Tetrax

The purpose of the work. Elucidation of changes in the number and distribution of little bustard (Tetrax tetrax Linnaeus, 1758) on the territory of the Rostov Nature Reserve in the 20th-21st centuries and the reasons for their transformation. Place and methods of work. The reserve is located in the arid Eastern European steppes. The authors used their own observations from 1959 and publications on Tetrax tetrax L. The materials are collected using regular route methods and animal tracking at individual sites, as well as analysis of published information. Results. The little bustard is a characteristic steppe species that historically lived on the Don land. Since the mid-twentieth century, the steppes have experienced deep anthropogenic changes, which have had a great impact on this species. Currently, the little bustard in the steppe zone is a rare species. The creation of the reserve has had a positive impact on this species. In it, the little bustard is a small breeding species, and its number is constrained by a number of factors. The intensification of economic activity in the region and the aridization of the climate make it necessary to improve environmental protection work.

scholarly journals Power line routing and configuration as major drivers of collision risk in two bustard species

Oryx ◽  
2020 ◽  
pp. 1-10 ◽  
Author(s):  
Ana Teresa Marques ◽  
Ricardo C. Martins ◽  
João Paulo Silva ◽  
Jorge M. Palmeirim ◽  
Francisco Moreira
Keyword(s):  
Abiotic Factors ◽  
Bird Species ◽  
Power Line ◽  
Power Lines ◽  
Mitigation Measures ◽  
Suitable Habitat ◽  
Collision Risk ◽  
Great Bustard ◽  
Line Configuration ◽  
Tetrax Tetrax

Abstract Collision with power lines is a major cause of mortality for many bird species. Understanding the biotic and abiotic factors that increase collision risk is therefore important for implementing mitigation measures to minimize mortality, such as power line rerouting or wire marking. Here, we used collision events registered during 2003–2015 along 280 km of transmission power lines in southern Portugal to analyse spatio-temporal patterns and collision risk factors in two sympatric, threatened, and collision-prone species: the great bustard Otis tarda and the little bustard Tetrax tetrax. The occurrence of collisions was not uniform across space and time, and variations could be explained by the species' ecological requirements, distribution patterns and behaviour. Although both species fly considerable distances between areas of suitable habitat, collisions were far more likely in power line sections with > 20% (for the little bustard) or > 50% (for the great bustard) of open farmland habitat in the surroundings. Power line configuration was also important: taller pylons and those with a higher number of wire levels posed a higher risk for both species. Wire marking had a small but significant effect for the little bustard, reducing collisions risk. There was, however, no similar effect for the great bustard, possibly a result of limited data. Mitigation measures should be implemented to prevent bustard collisions, including adequate route planning, ideally avoiding areas with > 20% of open habitat. Line configuration and wire marking are particularly important where such localities cannot be avoided and power lines cross areas with a high proportion of bustard habitat, including outside protected areas.

scholarly journals Surveys of wintering Little Bustards Tetrax tetrax in central Spain: distribution and population estimates at a regional scale

2007 ◽  
Vol 17 (1) ◽  
pp. 23-34 ◽  
Author(s):  
ELADIO L. GARCÍA DE LA MORENA ◽  
MANUEL B. MORALES ◽  
EDUARDO DE JUANA ◽  
FRANCISCO SUÁREZ
Keyword(s):  
Survey Methodology ◽  
Spatial Scales ◽  
Regional Scale ◽  
Suitable Habitat ◽  
Flock Size ◽  
Central Spain ◽  
Tetrax Tetrax ◽  
Potential Habitats ◽  
Available Information ◽  
Tagus Valley

Developing a standardized survey methodology to census and estimate the size of wintering populations is a main conservation priority for the endangered Little Bustard. We present a standard and repeatable methodology to census wintering Little Bustard populations at a regional scale, and the first statistically reliable population estimate of a Little Bustard wintering population in Spain. We carried out two surveys, in 2003 and 2004, using UTM 10 km × 10 km squares as census units, which were subjected to stratified sampling over the species' potential distribution range in the region of Madrid (Central Spain). Only the areas of potentially suitable habitat within squares of known winter presence of the species were considered. The species' winter distribution in Madrid was fairly constant between years, showing a fragmented pattern in three main nuclei. The number of Little Bustards observed was consistent between surveys (752 and 786 birds, respectively), with birds grouped in an average of 32 flocks (1 to 350 birds, mean = 27.9 birds). No between-winter differences in flock size were observed, although differences between sectors were significant. The highest densities were observed in the Tagus valley (mean density = 2.9 birds km−2, 293 birds), followed by north-eastern farmland (mean density = 0.6 bird km−2, 269 birds). The estimated size of the Little Bustard population wintering in the Madrid region was 1,051 (95% CI = 1,043–1,231). This calculation was based on recorded population density, measured as the number of birds per square kilometre, and considers the potential habitats available in each sector. We propose this methodology as adequate for surveying any Little Bustard wintering area, at both regional and smaller spatial scales. Survey results are consistent with previous tentative estimates for the region of Madrid, and with available information on Little Bustard movements. Sixty-five per cent of squares with Little Bustard presence were outside any protected area, which makes the wintering Little Bustard population of Madrid highly vulnerable to habitat disappearance and may affect the viability of breeding nuclei whose individuals winter in the region.

First occurrence of Eucoleus contortus in a Little Bustard Tetrax tetrax: negative effect of Red-legged Partridge Alectoris rufa releases on steppe bird conservation?

Ibis ◽  
2006 ◽  
Vol 149 (2) ◽  
pp. 405-406 ◽  
Author(s):  
DIEGO VILLANÚA ◽  
FABIÁN CASAS ◽  
JAVIER VIÑUELA ◽  
CHRISTIAN GORTÁZAR ◽  
ELADIO GARCÍA DE LA MORENA ◽  
...  
Keyword(s):  
Bird Conservation ◽  
Alectoris Rufa ◽  
Tetrax Tetrax ◽  
First Occurrence ◽  
Negative Effect

Population productivity and late breeding habitat selection by the threatened Little Bustard: the importance of grassland management

2017 ◽  
Vol 28 (4) ◽  
pp. 521-533 ◽  
Author(s):  
NUNO FARIA ◽  
MANUEL B. MORALES
Keyword(s):  
Habitat Selection ◽  
Species Conservation ◽  
Grassland Management ◽  
Breeding Habitat ◽  
Breeding Period ◽  
Tetrax Tetrax ◽  
Species Population ◽  
Suitable Habitats ◽  
Stocking Rates ◽  
The Relationship

SummaryWe investigated population productivity and habitat selection of the Little BustardTetrax tetraxin the late breeding period, in grassland-dominated landscapes of south-west Iberia. Specifically, our goals were to investigate how these parameters are influenced by the management of (1) grazing and (2) hay production. We conducted bird counts from 22 June to 4 July (2012 to 2016) using low speed 4x4 car surveys. The relationship between the density of the species, population productivity and farm management (grazing and haying) was evaluated using Generalized Linear Mixed Models and Kruskal-Wallis tests. Male and female densities were significantly higher in short vegetation compared to all other types of vegetation considered, but population productivity was similar in short and medium vegetation. Hay stubbles were found to be unattractive for the species. The availability of suitable habitats depends on the timing of grazing, notably of seasonal (spring) grazing. Species density was higher in fields ungrazed during winter and with moderate to high stocking rates in spring (around 0.8 LU/ha or higher), depending, at least for males and females, on each year’s weather characteristics. We conclude that low to moderate stocking rates during winter and spring are essential to ensure successful breeding and thus population persistence. Current levels of haying in our study area are detrimental for the species’ conservation.

Ranging behaviour of little bustard males, Tetrax tetrax, in the lekking grounds

2012 ◽  
Vol 91 (1) ◽  
pp. 35-40 ◽  
Author(s):  
Anna Ponjoan ◽  
Gerard Bota ◽  
Santi Mañosa
Keyword(s):  
Ranging Behaviour ◽  
Tetrax Tetrax
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