I saw then those magnificent birds, the
disposition of whose long feathers obliges them to fly against the wind.
When they played recorded male solos to pairs of birds, the
female joined in to sing along.
For other birds, the
researchers substituted fresh wax worms before each recovery session to create the illusion that both wax worms and nuts stay palatable.
These data suggest that at least two species of birds, the
American robin and the veery, may be reservoirs for A.
But if you share it with the birds, the
cost drops to that of-well, birdfeed.
In many birds, the
age of the female seems more important than the age of the male, he notes.
For these birds, the
15 miles between Healdsburg and their home in Young's yard is hardly a warmup.
For one group of birds, the
researchers blocked the local magnetic field.
Unlike most birds from the age of the dinosaurs, but like all living birds, the
Chinese species had a horny, toothless beak.
Unlike the DMS-sensitive birds, the
nonresponders are quite visible, forage mostly by day, and join large feeding groups, Nevitt observes.
Without hurting the birds, the
researchers outfitted each with a device that emits radio waves of a specific frequency, These 30-gram transmitters, which resemble tiny backpacks, enable the scientists to track the flight pattern of each bird, says Belant, who is now at the Great Lakes Indian Fish and Wildlife Commission in Cloquet, Minn.
In most fossils of early birds, the
delicate bones have been flattened by overlying sediments.