نتایج جستجو برای: threatened birds

تعداد نتایج: 56319  

Journal: :Brazilian Journal of Biology 2023

Abstract Wildlife trade is a profitable economic activity. Birds are among the most heavily traded animals worldwide, with numerous species threatened by pet trade. The present case study was stretched for period of one year to find out status wild birds’ in Bannu and Dera Ismael Khan Divisions. aimed types species, commercial prices bird, routes, overall income generated from dealers whether l...

Journal: :Conservation Letters 2021

Ecologically specialist species are more prone to extinction than generalist species, yet the global distribution and conservation of ecological specialism is poorly understood. Here, we show that avian dietary specialization roughly congruent with overall bird richness for resident breeding as well non-breeding species. However, some areas harbour a higher number diet birds expected given (e.g...

Journal: :Indian journal of science and technology 2021

Objectives: To assess the temporal variations of large wading birds in Point Calimere Wildlife Sanctuary and to suggest management recommendations for better visited sanctuary seasonally. Methods Statistical analysis: The population characteristic was carried out by employing a ‘direct count’ method. one-way analysis variance (ANOVA) performed understand impact various seasons on characteristic...

2000
V. Nijman

The Javan hawk-eagle (Spizaetus bartelsi) is a threatened raptor endemic to the densely populated island of Java. Historically very little is known about its biology. Recent surveys showed that the population size has been underestimated in the past. The breeding population is estimated to be 137±188 pairs with a total of 600±900 birds and con®rmed presence in 22 discrete forest blocks througho...

Journal: :Journal of evolutionary biology 2007
S S Taylor I G Jamieson G P Wallis

We compared historic and contemporary genetic variation in two threatened New Zealand birds (saddlebacks and robins) with disparate bottleneck histories. Saddlebacks showed massive loss of genetic variation when extirpated from the mainland, but no significant loss of variation following a severe bottleneck in the 1960s when the last population was reduced from approximately 1000 to 36 birds. L...

2016
Ana Benítez-López Iván García-Egea

—The distribution and frequency of color aberrations in wild birds is relatively poorly known. Here we report, for the first time, the observation of an aberrantly colored Pin-tailed Sandgrouse (Pterocles alchata), a threatened steppe bird with cryptic plumage and behavior. The bird displayed a continuous white patch on its back that was not bilaterally symmetrical (i.e., not far from the neura...

Journal: :Biotropika: Journal of Tropical Biology 2023

Perhutani area in Poncokusumo is inhabited by endemic and protected mammals birds. However the data of species are still lacking while wildlife threatened forest conversion hunting activities. Â This study aims to determine bird conservation strategies through watching ecotourism based on community. The objectives survey birds Poncokusumo, analyze perception knowledge community visitors toward ...

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