Why so many kinds of passerine birds?

Why So Many Nodes?

This paper provides an analysis of the representation of various grammatical phenomena in both constituency structure and dependency structure (hereafter c-structure and d-structure), including agreement, case marking, and word order in transitive sentences, as well as three theoretical constructs, and the interface between the form of a sentence and its meaning. There is a crucial structural r...

Why are there so few smart mammals (but so many smart birds)?

The expensive brain hypothesis predicts an interspecific link between relative brain size and life-history pace. Indeed, animals with relatively large brains have reduced rates of growth and reproduction. However, they also have increased total lifespan. Here we show that the reduction in production with increasing brain size is not fully compensated by the increase in lifespan. Consequently, t...

How Many Kinds of Birds Are There and Why Does It Matter?

Estimates of global species diversity have varied widely, primarily based on variation in the numbers derived from different inventory methods of arthropods and other small invertebrates. Within vertebrates, current diversity metrics for fishes, amphibians, and reptiles are known to be poor estimators, whereas those for birds and mammals are often assumed to be relatively well established. We s...

HOMAGE TO SANTA ROSALIA or WHY ARE THERE SO MANY KINDS OF ANIMALS?

Homage to Santa Rosalia or Why Are There So Many Kinds of Animals ?

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