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The straw-headed bulbul (Pycnonotus zeylanicus) is a species of songbird in the bulbul family, Pycnonotidae. It is found from the Malay Peninsula to Borneo.Its natural habitats are subtropical or tropical moist lowland forest, subtropical or tropical mangrove forest, subtropical or tropical moist shrubland, arable land, plantations, and rural gardens.
Population viability analysis (PVA) is a species-specific method of risk assessment frequently used in conservation biology. It is traditionally defined as the ...
Singapore has roughly 80 species of mammals (out of 11 different orders) including 45 species of bats and three species of non-human primates. [9] Currently, the only introduced non-domestic mammal species in Singapore is the variable squirrel. [10] The abundance of bats however has been decreasing rapidly due to habitat loss of over 95%. [11]
This is a list of the bird species recorded in Singapore.The avifauna of Singapore include a total of 450 species, 35 of which have been introduced by humans. [1]This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of The Clements Checklist of Birds of the World, 2023b edition. [2]
Johora singaporensis, the Singapore stream crab [3] or Singapore freshwater crab, [1] is a critically endangered species of freshwater crab endemic to Singapore. It grows to a size of 30 millimetres (1.2 in) wide. [4]
They vary in length from 13 cm and 13.3 g (0.47 oz) for the tiny greenbul to 29 cm and 93 g (3.3 oz) in the straw-headed bulbul. [13] Overall the sexes are alike, although the females tend to be slightly smaller.
In 2020, the annual total population growth rate in Singapore was −0.3%, and its resident total fertility rate (TFR) was 1.10, below the replacement rate of 2.1. In 2023, it further declined to 0.97. The first phase started with the launch of the Singapore Family Planning and Population Board in 1966 to aggressively promote family planning ...
Lutz has worked on family demography, fertility analysis, and population projection as well as the interaction between population and the environment. He is a leading academic in the field of population and sustainable development and was one of the scientists appointed by the UN to write the Global Sustainable Development Report 2019.