nps photo
Pinyon Jay
Conservation Message:
Like Limber Pines, Pinus flexilis, Pinyon Pines are dependent on Pinyon Jays and for their survival. These birds are equipped with a crowbar- shaped bill and throat storage pouches so that they can harvest, transport and cache large quantities of pine nuts. To insure survival through the most difficult winters, a single bird will need to cache up to 30,000 nuts. Seeds from the caches that are not eaten during the following winter, will germinate and sprout another generation of Pinyon Pines.
Evolutionary biologists theorize that this symbiotic relationship has been evolving for a very long time. Initially, Pinyon Pines probably produced regular tiny pine seeds with wings, relying on the wind to spread the next generation. As these two species of cache-making birds began to specialize in Pinyon Pines, the trees that produced less wing and larger, more nutritious seeds were rewarded by having increasingly more of their seeds well-planted by the birds. Once the relationship was cemented, producing any wing on the seed was a waste of energy because the trees could now trust the wings of the birds to get the seeds where they needed to go. Lastly, when the seeds became increasingly nutritious, they needed to be protected from uninvited guests like rodents and other birds. So as heavy hulls and rock- hard cones were developed, the birds had to produce a crowbar-like tool to pry the cones open and crack the hulls; hence the heavy, long, and curved bill these two birds have in common.
Now these trees and birds are mutually dependent. Without these two species of birds, Pinyon Pines would no longer be able to reproduce. These highly-specialized, large, heavy nuts would never get transported far enough away from the parent tree to be able to find their own supply of sunlight, water and nutrients without competition from the parent.
The obligation of the pine nut lovers is to protect this fragile relationship. Surprisingly enough the most destructive thing you could do is to attempt to feed one of these birds, even if you are only offering them a pine nut. Parent birds that learn to accept handouts from humans don't bother teaching their young how to process pine nuts the hard but natural way. The young will ultimately die of starvation once the tourist and their handouts are gone. Fewer Nutcrackers and jays will mean fewer Pinyon Pines, which means even more expensive pine nuts. If for no other reason than for the sake of affordable pesto...
Please do not feed the wildlife.