The park's pinyon and juniper forests also could be stressed by warming and drying conditions, threatening specialist birds like the pinyon jay
and pygmy nuthatch.
Generalists had C = 0.85 between years, however, C = 0.66 between treatments because we detected two species, pinyon jay (Gymnorhinus cyanocephalus) and American crow (Corvus brachyrhynchos), in control units only.
Of these, only pinyon jays were detected more than twice (Table 3).
And while fellow corvids tend to gather nuts from open cones, the pinyon jay
hammers open green cones as well.
One is Clark's nutcracker, which stores more food than any of the others; the second is the pinyon jay
(Gymnorhinus cyanocephalus), which stores less food than Clark's nutcracker, but more than the third species, the scrub jay (Aphelocoma coerulescens); if degree of dependence on stored food is associated with an enhanced spatial memory, then on spatial tasks the more dependent species should outperform the less dependent.
The pinyon jay
: behavioral ecology of a colonial and cooperative corvid.
27 holding me my love yes but some times as with him I forget seem to think myself the sun around which in some distant or closer buzzing around my head my hand batting away--but needed him to start / need you to keep me going 28 nothing to keep: adobe crumbles scrub oak juniper pinyon jay
hawk crow squawk of what will not word urn bits of tagged bone star- laced darkness that clothes air 29 The clothes have come out of their houses, dresses, jackets lit the colors of embers, or monarchs: they are flying like butterflies and now the houses are also flying: transparent except for those that have gathered blue sky into themselves 30 Beyond blue: absence containing contained On the road crows consume a lizard.
I saw my first gray flycatcher at Chaco Culture National Historical Park in New Mexico, sallying among ruins at Pueblo Bonito, and my first pinyon jays
near preserved pueblos at Mesa Verde National Park in Colorado.
found that highly social pinyon jays
do better in the typical TI task than closely related but less social scrub jays.
Balda started studying pinyon jays
and Clark's nutcrackers in the late 1960s.
Nutcrackers and pinyon jays
, which both feed almost entirely on stored food while nesting, have excellent memories.
Females with more conspicuous plumage than other females of the same species have been shown to be more aggressive in some species: pinyon jays
(Gymnorhinus cyanocephalus, Johnson 1988), some hummingbirds (Bleiwess 1985, 1992), and in capuchinbirds (Perissocephalus tricolor, Trail 1990).