Evolution in an Urbanizing World
What makes a bird successful in the city? Jakob Mueller and colleagues first attempted to answer this question in blackbirds, finding genomic signatures of selection in the SERT gene associated with harm avoidance. Now, building on only a handful of studies to explore the genomic basis of urban adaptive responses, Mueller and colleagues tackle this... Continue Reading →
Urban birders strike again! This week we bring a pair of house sparrows at a field station in Louisiana catching food for their young. Do you have a photo or video of an urban species doing something unusual? What about a rare plant or animal that you were surprised to find in a city?... Continue Reading →
The Galápagos Islands are renowned for their unique, endemic biodiversity which inspired Charles Darwin to develop his theory of evolution by natural selection. In particular, Darwin’s finches are an iconic example of adaptive radiation due to natural selection, where ~18 species have evolved from a single, common ancestor. Adaptive radiations can occur when exploitation of... Continue Reading →
As areas become more urbanized, fauna are continually exposed to novel anthropogenic structures and are forced to adapt. However, adapting is not always an option. For example, we see that individuals across various groups have not adapted to roads and train tracks (e.g., deer, bears, birds) and the outcome is fatal. Instead of creating barriers... Continue Reading →
Life in the city is stressful, for humans and wildlife! One of the main physiological traits thought to be impacted by the novel pressures of urban life, such as noise and light pollution, is stress hormone concentration. Nevertheless, no patterns have emerged across species. Allison Injaian and co-authors fill this gap in knowledge with their... Continue Reading →
Cat TV is a great way to keep your feline friend entertained. What is cat TV? It is a window that your cat can look out and watch the local flora and fauna. Cats in high rise buildings rarely get to see birds up close, but this one got a special treat. A woodpecker flew... Continue Reading →
Now that we are still in pandemic mode, more organisms that we might not normally see in urban areas are popping up on our social distanced walks. Here we see a flock of turkey vultures in Erindale Park, hanging out near the recycling bins. You'll want to practice more than the 6 feet of social... Continue Reading →
In some communities people will feed the local birds, ensuring that they will have a great view of these birds. Oftentimes, pigeons will locate these feeding spots and aggregate. In this neighborhood in downtown Toronto, one person purposefully leaves food for the pigeons. Although feeding wildlife is not advisable and can lead to unintended consequences... Continue Reading →
As winter is finally ending and warmer weather is on the way, we bring you one more winter observation. Many birds fly south for the winter, but some stick around and brave the cold. This owl is one of those birds that stayed in the city during the winter months. https://twitter.com/ABBestphotos/status/1226710932547502080?s=20 Do you have a... Continue Reading →
PDF version of infographic Download Full paper here: Schmidt, C., Domaratzki, M., Kinnunen, R. P., Bowman, J., & Garroway, C. J. (2020). Continent-wide effects of urbanization on bird and mammal genetic diversity. Proceedings of the Royal Society B: Biological Sciences, 287(1920), 20192497. doi:10.1098/rspb.2019.2497
Thanks to the collective efforts of urban birders, we have been able to bring a suite of urban observations of birds. Here is the majestic bald eagle, hanging out in a tree in the East River Park of Manhattan, NY. Do you have a photo or video of an urban species doing something unusual? What... Continue Reading →
Urban areas are known to be prone to habitat fragmentation. We've seen the intense urbanization in New York City lead to the rapid divergence of mouse populations and the subdivision of bobcats in Los Angeles. But the adverse effects of habitat fragmentation are difficult to quantify given that they differ based on the ability of... Continue Reading →
If you've walked around a city with pigeons, you might have noticed that many of them are missing toes or have deformed feet. These foot deformities are common and may arise due to a number of different ailments including: chemicals that make surfaces sticky or apply an unpleasant odor; physical deterrents that are placed on... Continue Reading →
Here we go again NYC, urban birds! I am always amazed at how many of our observations come from NYC. Before this blog, I had thought that such a large city would only support pests, like pizza rat. Here's a pair of hawks nesting near a clock tower in Marcus Garvey Park (Harlem). A special... Continue Reading →
Many urban wildlife biologists face unique challenges when trying to capture their study organisms. Traditional methods that are used in remote areas are often not available to urban wildlife biologists, either because the method requires traps that the public tampers with (though this problem does happen to non-urban biologists as well), because urban animals are... Continue Reading →
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