The New Neotropical Companion
A diet of fruit is not without potential problems. Interspecific competition is common, because fruit is clustered on one or a f ...
Oilbirds are closely related to the diverse family of nightjars (Caprimulgidae; chapter 15), of which the Eastern Whip- poor- wi ...
together at fruiting trees. More important, however, is the fact that a diet of palm and laurel fruit, though rich in calories, ...
at the lowland forest at La Selva Biological Station, of 185 tree species studied, 90% produce fleshy fruits; of those, approxim ...
females. The other is female choice of males that exhibit characteristics signaling high fitness. Characteristics of bright plum ...
numerous forms from one species to another: dominance behavior, guarding females, active interference with other males’ attempts ...
The Amazing Dancing Manakins: Don’t Miss Them Male manakins are glossy black with bright yellow, orange- red, scarlet, or golden ...
bearded Manakins in Trinidad have revealed that life on a lek is usually fairly long for individual birds. Some live for a dozen ...
rotates his posterior side to side, gently touching the female on her chin with his tail filaments. Females apparently respond w ...
motion an evolution of lek behavior such that lekking is now more readily explained by phylogenetic history than by any immediat ...
Seeds often contain toxins, and thus, though fruit pulp is digested, seeds are not. Seed toxicity enhances the probability of di ...
from plant to plant, animals disperse pollen, making cross- pollination efficient and ensuring reproduction of the plants. This ...
Plants and Hummingbirds: A Coevolution Hummingbirds have evolved mutualistic relationships with plants, feeding on nectar but fa ...
Finally there are generalists, which follow shifting foraging patterns among various resources. Evolutionary “Cheaters”: The Flo ...
reportedly emit a musky “bat- like” odor. These flowers open at night, when bats are active. Flowers may be shaped like a deep v ...
a relationship that apparently dates to about 50 million years ago. Attine ants are largely restricted to the Neotropics, where ...
Leaf- cutter ants are part of a larger ant group called the fungus garden ants (Myrmicinae), each species of which, remarkably, ...
opportunity for cross- fertilization among colonies. Because of normal evolution, the fungi cultivars diverge genetically. Studi ...
themselves. There is a single queen per colony, who remains in the bivouac except when the entire army is on the move, at which ...
species) exposed by the ants. The relationship between army ants and ant- swarm birds has been puzzling. Scientists had reasoned ...
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