Evolution in an Urbanizing World
For the month of November we're doing something special... a comment contest! We want to liven up the conversations here on the blog, and to do that we need your participation! To enter the contest, all you have to do is post a comment here on the blog. At the end of the month, the user who... Continue Reading →
Welcome to Urban Observation of the Week: Halloween Edition 2019! This year, we're celebrating Halloween by featuring an oft-forgotten taxon in the world of urban evolution: fungi. This kingdom is remarkably prepared for a holiday dedicated to all things creepy. Below are some examples of fungi that could go trick-or-treating any day of the year... Continue Reading →
From Anoles to Indian Agamids to Australian Water Dragons to Western Fence Lizards, lizards from diverse branches of the squamate tree are proving themselves in urban environments. Add one more species to this growing list of urban lizards: Brazilian lagartixas, Tropidurus hispidus. In a recent paper, Antonio de Andrade examined the abundance and habitat use of... Continue Reading →
If you have ever been to the desert Southwest (of the USA), you have probably noticed spider webs throughout the summer and even in early fall. And even if you have not noticed the webs, you'll likely have seen leaves that look like they are floating in the air, which is really leaves stuck in... Continue Reading →
This week's post comes from Dale Stevens, who tells us about the effects of elevated urban temperatures on black widow spiders. Along with landscape changes, urbanization also leads to a significant increase in temperature. Human-made surfaces retain heat during the day and stay hot well into the night. Because of this, animals that thrive in... Continue Reading →
Last year I saw this tweet that so deeply resonated with me: https://twitter.com/rodger/status/1075094981193265154?lang=en Squirrels are abundant across my own campus in New York City and I have heard numerous students remark that our squirrels are somehow better/different than the squirrels in the rest of the city. We've even had our fair share of squirrels in... Continue Reading →
Along with the altered landscape, urban organisms also encounter novel (anthropogenic) food resources. And while anthropogenic food can be abundant in cities, it is often lower in quality than natural food. This can lead to a situation in which low-quality but abundant food attracts animals to urban areas, but due to its reduced quality, this... Continue Reading →
Most of the time we expect pigeons or other common birds to be spotted on the power lines and poles. Sometimes, we get a rare gem, the bald eagle! We have shown you a number of birds in these "Urban Observation" posts. This one is super majestic for sure. But sadly, many birds have... Continue Reading →
The field of urban evolution is relatively young, but researchers have been fascinated by animal movement through cities for quite some time. Recently, I was perusing the archives of the Journal of the Lepidopterists’ Society and came across a note by Sidney Hessel detailing the movements of monarch butterflies through Manhattan. He observed 82 monarchs... Continue Reading →
This week our observation comes from Dr. Christy Zolnik who spotted this Red-tailed Hawk (Buteo jamaicensis) on the southern edge of Marcus Garvey Park in Harlem, New York City. We've posted about Red-tailed Hawks before as part of our Urban Observation of the Week, but seeing hawks in the city never ceases to amaze me.... Continue Reading →
When was the last time you cleaned your bird feeder? Bird feeders are a common sight in the city. For many, they represent a chance to view nature from the comfort of their own home, with little else required but to go out each morning to fill the feeder in their pajamas. This gives city... Continue Reading →
Life in the City turns 1 year old today! Thank you all for following our blog. We are very proud of how it has grown and owe a huge thank you to our amazing contributors. In the last 365 days we have published 147 posts! The blog has received a total of 48K hits from 16K... Continue Reading →
Virginia opossums (also known as "opossums" or "possums") might be common in suburbs (we've seen them nesting in a BBQ grill), but they're rather rare in city centers. That's why reddit user ShabShoral was surprised to see an opossum hanging out in front of the makeup store Sephora at Union Square in New York City.... Continue Reading →
(I’m writing this the night of the September 20, 2019 Climate Strike. This is merely the consequence of literal months of procrastinating—the paper I am writing about got published in July, and was online as a preprint even before—but it seems sadly appropriate as I am going to talk about adaptation to hotter environments.) If... Continue Reading →
This tribute also corresponds with another annual ritual -- the migration of birds from their summering grounds north of New York City, to their wintering grounds south of the city
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