Hmmmm...I often find old nests while walking along the creek and woods with the dog and cats. Starting plants in them and then planting in the flowerbed or garden would eliminate the need for starting pots, and the nest would not only be an interesting feature but would also eventually break down, adding organic matter and some bird poop to the planting area.
After blooming, most indoor bulbs will be spent and won't flower again. But if you want to reward their service instead of heartlessly tossing them onto the compost pile: Wait for the leaves to die back naturally. Then plant in the garden and feed them an organic fertilizer. (Narcissus and daffodil bulbs are more likely to respond, and bloom again in the garden, than hyacinths.) Image via Julia's Vita.