House Sparrows (passer domesticus). Some of us enjoy their resilience, cheerful presence, and ubiquitous "Cheep!" Some of us can't stand seeing them everywhere, including in the nesting boxes we've set out for bluebirds. Love them or hate them, the fact is that they are an invasive species, brought here from England in the mid-19th century and thriving ever since in populated areas—often at the expense of other songbirds.
A new citizen science project is now making use of House Sparrow eggs in ways that should satisfy both friend and foe. The Sparrow Swap, out of the North Carolina Museum of Natural Sciences, asks volunteers for House Sparrow eggs to test for pollutants. The aim is to discover whether these birds, often regarded as pests, can help us monitor our environment. Meanwhile, taking eggs from nests provides another research opportunity, namely population control. Participants are given fake eggs to swap for real ones in hopes that the nesting sparrows will try to hatch them rather than build a new nest when they discover their original clutch has vanished. If this protocol works, it will provide the basis for an environmentally safe way to reduce the number of House Sparrows.
Want to know more or participate? Look for "The Sparrow Swap" on Facebook or check out this website.