Evolution in an Urbanizing World
Did you know that it has been estimated that the anthropogenic mass, representing all human-made objects, would exceed the living biomass in 2020 ± 6 years? Each year, humans accumulate 30 Gigatons of anthropogenic mass, based on the averages of the last 5 years. The article that made these estimations even mentions that “this corresponds... Continue Reading →
Urban environments consist mostly of bricks, concrete, asphalt, metal and glass: not very alluring substrates for many terrestrial organisms. Certain mosses and lichens can be seen sometimes on walls in the city, but even they will not easily grow in direct sunlight during dry periods, especially taking the ‘urban heat island effect’ into account (Deilami... Continue Reading →
Do you remember when was the last time you blew dandelion seeds? Do you remember the last time you stopped your busy schedule and noticed a dandelion blooming? As far as I can remember, I haven't done this since I was in primary school. Why are dandelions becoming more and more rare in big cities?... Continue Reading →
Around May, enormous swarms of termites wing up, coming out from the ground, trying to find the perfect match and establish their own families. After they find each other, the lovers shed their wings and seek out locations to build their marital homes, where they then reproduce. The nuptial flight of Macrotermes barneyi occurs every... Continue Reading →
Cats are a staple in human culture. They have been fed by us, housed by us, even worshipped by us, and are still helping us with many of our problems today — ranging from controlling pests to just being a cute companion. Exactly for this reason, the cat (Felis catus) has been taken alongside man... Continue Reading →
At first glance, a city is a hodgepodge of buildings, busy streets and public squares, people, traffic, and overall bustle. Yet, if you manage to see past the cacophony of everyday life, there is so much more to explore. A small co-resident of many cities, the ivy bee, reminds us of this. Colletes hederae, more... Continue Reading →
Knotted willows characterise many Dutch landscapes, where they are often seen in a row along creeks that have existed for decades. These willows are pruned every few years, which causes the characteristic wide “knot” at the treetop to form over time. Complex shapes can form due to this pruning, and it is quite common to... Continue Reading →
Who would ever have expected to see plovers on the banks of the Huangpu River in Shanghai? The Huangpu River is the "mother river" of Shanghai that flows north throughout Shanghai. It passes some of the most population-dense regions of the city, including Lujiazui and the Bund, and provides green paths on both banks for... Continue Reading →
Lurking beneath the trash laden leaf litter of the 5 boroughs lurks a secretive little amphibian that exemplifies the struggle between the forces of urbanization and the biological need to adapt or face extinction. The Eastern Red-backed Salamander (Plethodon cinereus) is a unique kind of caudate with numerous traits that make it well equipped to... Continue Reading →
Have you ever seen a groundhog in Central Park? Or any other urban park? https://twitter.com/DiveArtist/status/1683549457999175680 According to @BirdCentralPark, these adorable rodents are not a common sight in Central Park, but there have been known individuals in the northern parts of the park. The groundhog (Marmota monax) is a very widespread North American species. Their range... Continue Reading →
The Asian Ladybeetle (Harmonia axyridis) is a common sight in many urban gardens, such as those on Governor's Island in New York Harbor. They are voracious predators, feeding on soft-bodied arthropods like aphids and scale insects. These beetles were imported into the united states in 1916 to help control insect pests. Larval Asian Lady beetle... Continue Reading →
Native to the Indian subcontinent and the southern fringes of the Sahel, the ring-necked parakeet (Psittacula krameri) looks wonderfully out of place in the cities of Western Europe. How and when exactly the colourful bird species established itself in isolated pockets so far from its naturally occurring range is heavily disputed, and subject to many... Continue Reading →
Sadly, plastics and litter have become part of the urban and often rural environment. It can be found almost everywhere and in any form – ranging from plastic bags to broken traffic cones. We consider it trash, however, for some birds, it is a jackpot. Often, litter is creatively included during nest building by these... Continue Reading →
Flamingos are definitely not the first species that comes to mind when I think of urban birds, however, that might change if I ever travel to flamingo city! https://twitter.com/shivangmehtaNW/status/1668269832658206726?s=20 As someone who has personally only seen flamingos in captivity, @shivangmehtaNW's photos of hundreds of these vivid birds gathered in front of sprawling apartment buildings were... Continue Reading →
In Port Phillip City, this arboreal individual has found an urban alternative to climb! https://twitter.com/SeabirdResearch/status/1666378562184826881?s=20 The Common Ringtail Possum (Pseudocheirus peregrinus) is a marsupial species, widely distributed across its native continent of Australia. This animal is arboreal and traditionally could be found in forests and woodlands primarily on the eastern coast of Australia. Currently, ringtail... Continue Reading →
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