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2014: Postglacial northward expansion and genetic differentiation between migratory and sedentary populations of the broad-tailed hummingbird (Selasphorus platycercus).
2012: Asynchronous changes in phenology of migratory broad-tailed hummingbirds and their early-season nectar resources.
Around the Rocky Mountain laboratory, broad-tailed hummingbird pairs have time to raise only one brood of at most two chicks per summer.
This idea comes from studying broad-tailed hummingbirds that migrate north from Central America each spring to high-altitude breeding sites in the western United States.
There is also a partial bibliography of books used by the artist/author to create the text and illustrations of "Bring On the Birds." From the Broad-tailed Hummingbird to the flightless Ostrich, "Bring On the Birds" is a natural wonder winner, an ornithological gala celebrating all exotic things bird-like.
By providing new information concerning the broad-tailed hummingbird, I have provoked the opportunity for you to make both an intellectual connection (imagine the weight and length of the bird) and an emotional connection (applying its migration to a travel situation familiar to you).
The four birds from previous experiments plus two additional birds (two Broad-tailed Hummingbird males) were used.
For example, rising temperatures may force broad-tailed hummingbirds into altitudes beyond Mesa Verde's highest elevations (topping out at 8,640 feet), crowding them into a smaller land area and potentially exiling them from the park.
Conservationists are working on both sides of the border to educate citizens on the importance of these pathways, so that birds like these broad-tailed hummingbirds (above, center) will continue to have natural alternatives to plastic feeders.
The self-incompatible flowers are visited primarily by nectar-feeding, broad-tailed hummingbirds (Selasphorus platycercus) and rufous hummingbirds (Selasphorus rufus).
They are visited primarily by breeding resident Broad-tailed Hummingbirds (Selasphorus platycercus) and southward-migrating Rufous Hummingbirds (S.