|  Black-capped Chickadee
(Poecile atricapillus)
 The cheerful and active black-capped chickadee is one of the most beloved birds in North America. It is found wherever there is suitable habitat, such as the woodlands of western Pennsylvania and the edges of parks and backyards.
The chickadee is one of several bird species that uses grapevine in the construction of its nest. Researchers believe this is because of grapevine’s antibacterial properties. The chickadee also seems to have a good sense of memory for its food caches. It stores seeds, nuts, and the occasional insect under bark or inside leaf clusters. Studies show that the bird can remember these locations for up to a month.
The chickadee is known for its ability to adapt to cold temperatures. Every day, it can take in up to ten percent of its body weight and convert it to fat. It can also conserve energy by lowering its body temperature by 10–12 degrees. This ability is only found in a few other bird species, such as hummingbirds.
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