Tag: Bergmann’s Rule

Environmental Stress Hypothesis

November 10, 2022 By arne hendriks Off

In the past 4.000.000 years, human evolution is broadly characterised by a trend of increasing body mass and stature associated with changes in behaviour, diet, cognition, and demographic expansion. The past 2.000.000 years have seen an increase in estimated body size among most Homo species from an…

Human-sized Penguin

July 20, 2022 By arne hendriks Off

Global warming is causing many species of animals to shrink. That is why we’re intrigued by this counter-intuitive RESEARCH on prehistoric giant penguins. Most penguin species today are small to average sized flightless birds that live in the colder regions of the southern hemisphere. They…

Small Amazonians

November 27, 2021 By arne hendriks Off

Birds are sensitive indicators of environmental change. A recent study of understory birds of the Amazon rainforest over a timespan of 40 years and 77 species shows again that most birds are adapting to the current drastic environmental changes by becoming smaller. By zooming in…