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"Shall I not rejoice also at the abundance of the weeds whose seeds are the granary of the birds?" - H.D. Thoreau
Today I found a flock of 25 bobolinks gorging on seeds in a patch of grass (below). It reminded me that wild seed bonanzas can rival birdfeeders in quality and quantity. The bobolinks, plus about 10 savannah sparrows, were confined to a patch of one particular type of grass, a native species named deer-tongue (Dichanthelium clandestinum). It is recognized by its fat leaves, hairy stem, and seeds hidden within a tube at the top of the plant (hence the "clandestine" species name, I guess). The birds were flying from plant to plant, voraciously picking the seeds out of the tops. It reminded me of another natural spectacle: the multi-species bird parties that occur in a fruiting red mulberry tree in June. Always more satisfying to watch (for me) than a bird feeder for some reason.
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Later in the day, I came across two more bird parties. One, again, in a patch of deer-tongue, and another in a patch of different native plant: lamb's quarters (Chenopodium album). The lamb's quarter party was less diverse - consisting only of savannah sparrows - but it was just as hopping.
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The savannahs were obviously quite happy gorging themselves on the seeds, which are quite a bit smaller than deer-tongue's, and in fact look like tiny black specks.
They are apparently nutritious...to humans too. Wild food guru Euell Gibbons recommends grinding them into a hearty flour. (As a side note, I happen to know that the leaves are also much relished by real lambs.) Mixed in with the lamb's quarters was another native (though often disparaged) birdseed-bearing plant: ragweed. The birds will have to wait a while for this one, however. Right now it is still in the pollen-spewing (sneeze-inducing) flower stage.