The New Neotropical Companion
the field, especially in areas where populations are separated by allopatry. If two populations look alike and seem likely to be ...
Adaptive Radiation in Bats The basic bat is a marvel of adaptation. Bats are the only mammals capable of powered flight (excludi ...
the area of Connecticut. Only 45 bat species regularly occur in the entire continental United States. The adaptive radiation of ...
locate insects in the air but instead to locate fish just beneath the water’s surface. It gets the name Bulldog Bat from its fla ...
be colonial or solitary roosters. Roost sites include caves, crevices, hollow trees, and even tree trunks (plate 8- 26). Some ba ...
tremendously among species. Many species feed on fruit as well as insects, and a few have diverged entirely from capturing insec ...
Panama alone, seven of these similar species occur. The Great Kiskadee (Pitangus sulphuratus; plate 8- 29) and the Boat- billed ...
relative abundances of various insect prey. One seasonal and dramatic switch is seen with the Eastern Kingbird (Tyrannus tyrannu ...
The spectacular Fork- tailed Flycatcher (Tyrannus savana; plate 8- 39), which is an austral migrant (meaning that it migrates no ...
climatic and physical barriers that greatly enhance geographic isolation among populations. More recently, approximately 20 mill ...
and its tributaries is sufficient to isolate populations of birds whose individual members are reluctant to cross such a wide ex ...
Analysis of pollen taken from sediments of Amazon lakes in Ecuador and Brazil does not support the refugia model. Pollen is resi ...
44). Ground sloths, now all extinct, were robust, large terrestrial sloths with long claws (plate 8- 45). They were probably lar ...
who have since radiated into 54 living genera— and you begin to see why the effect of North American mammals on South American e ...
Plants: Uniquely High Species Richness While looking around inside a Neotropical rain forest one cannot help but wonder just how ...
Chapter 9 Why Are There So Many Species? Plant species richness peaks in Amazonia. Alwyn Gentry, working in upper Amazonia and C ...
absent from Reserva Ducke, presumably because of the poor soil conditions at that particular site. The similarities among these ...
canopy. Fogging involves the spraying of insecticide into the canopy of the tree and subsequently collecting (on cloths spread o ...
approximately 40% of all tropical terrestrial arthropod species (including spiders, crustaceans, centipedes, and millipedes, as ...
The Tropics: Cradle or Museum? Ecologists have offered two metaphoric views of the tropics to account for their high species ric ...
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