Evolution in an Urbanizing World
Cities are becoming more and more grey, with less and less living biomass. The consequence is that there is not enough natural nesting material available for the urban birds. These birds adapt to use alternative anthropogenic nesting materials. Examples include synthetic twine, string, and rope or artificial plants made of plastic (Hiemstra et al. 2021).... Continue Reading →
Some fries left on the ground, a half-eaten sandwich, or some breadcrumbs kindly given by someone on a park bench. Pigeons (Columba livia) in the city don’t shy away from eating human-derived foods. Although most pigeons are eager to eat our food scraps, this behaviour has been linked to a likely downside: the urban lifestyle... Continue Reading →
Juan Diego Ibáñez-Álamo, Kaspar Delhey, Lucía Izquierdo, Mihai Valcu, Bart Kempenaers Juan Diego Ibáñez-Álamo and Kaspar Delhey shared first authors. Abstract Rapidly expanding urbanisation presents significant challenges to wildlife. Consequently, many studies have investigated the impact of urbanisation on diverse organisms. However, despite the ecological relevance of animal colouration, its association with urbanisation remains poorly understood. Using a global... Continue Reading →
Coastal cities in Europe are swarmed with gulls, to the annoyance of many of those cities’ inhabitants. Gulls (Larus spp.) are naturally cliff-nesting species, but are able to thrive in urban areas because of the high food availability, the suitable climate, the similarity of nest substrate, lesser risk of predation and the presence of conspecifics... 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 →
Metabolic adjustment in urban birds: glycometabolic enzyme activities in urban and rural tree sparrows (passer montanus) J Shang, S Cun, S Zhang, W Liang Abstract Urbanization is rapidly changing habitats of wild birds around the world. Food availability is one of the important factors leading to phenotypic differences between urban and rural bird populations. Comparing... 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 →
A couple of weeks ago in Detroit, a ring-necked pheasant (Phasianus colchicus) was spotted crossing a major urban road, seemingly to get to a nearby park! Although the details of this individual are hard to see in the photo, the presence of a white ring around its neck when zoomed in and the long, pointed... Continue Reading →
Ever notice these long-necked denizens of NYC? Canada Geese (Branta canadensis) are a familiar sight in many parks and open spaces within the city, leading complex lives. New York City boasts 3 of the 7 subspecies of the Canada Goose, and it may come as a shock to know that the one subspecies we observe... Continue Reading →
Check out this Mute Swan (Cygnus olor) sauntering about the busy streets of Leicester! https://twitter.com/Hannam79/status/1602660747997216770 This species of swan is native to most of Europe and has been introduced to the eastern United States. They reside in various aquatic ecosystems, including urban lakes and ponds. However, as this tweet's author stated, they don't often take... Continue Reading →
In a previous post titled Meta-analysis of Urban Bird Phenology, we discussed how urban conditions have affected the average value of phenology and reproductive phenotypes in bird species. Capilla-Lasheras et al. found that urban bird populations had lower values than their non-urban conspecifics for three life-history traits, indicating earlier lay dates, smaller clutch sizes, and... Continue Reading →
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