Take a look at this art project entitled, "Spontaneous City in the Tree of Heaven"
In the sought-after London boroughs of Chelsea and Islington, inner city birds often have to claim their nesting space quickly! However, birds that are open to changing their wild ways might be convinced to try out the innovative bird-housing concept developed by the artists at London Fieldworks. The "Spontaneous City in the Tree of Heaven" opened recently as part of the Secret Garden Project by UP Projectsand hopes to develop into a haven of biodiversity and create a new public awareness of the ecological and cultural value of urban green spaces. (via Inhabitat)
These look very pretty, although I am curious as to how they fare when the tree moves or when it grows.
As an added layer of biodiversity speak, there's a bit of irony in the title of the project. Turns out the "Tree of Heaven" or Ailanthus altissima is actually a tree species of much botanical interest in London, and elsewhere in England generally. Essentially, a lot of folks are quite concerned that this ornamental turn invasive species is poised to rocket in numbers. It's one of the fastest growing trees around, it's allelopathic (meaning it produces a chemical that inhibits the growth or other plants), and its seed production capabilities are almost unmatched. In fact, the female tree is capable of producing upwards of 30,000 seeds per kilogram of tree! That would be akin to a small tree as heavy as me (at about 160 pounds), being able to produce 2.2 million seeds!
Why is this tree a particular interest these days? Well, over the years, climate has been steadily getting warmer and sunnier in England, and given that the Tree of Heaven is shade-intolerant, the extra sunlight is possibly giving the opportunistic tree the small push needed to expand greatly in numbers.
Anyway, perhaps this means more places for the birds to live?
