H. Wiley

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Many animals communicate in situations that make it difficult to discriminate a species' signals from those of others. Consequently, coexisting species usually have signals that differ by more than the minimum required to prevent overlap in acoustic features. These gaps between signals might facilitate detection and discrimination of degraded signals in(More)
Acadian flycatchers, Empidonax virescens, like many other tyrant flycatchers (Tyrannidae), sing complex songs with little variation among individuals. Measurements of frequency and timing revealed that individuals' songs included consistent but slight individual differences. A comparison of differences between songs of territorial neighbours and between(More)
Evidence for reproductive character displacement (RCD) has accumulated more slowly than for ecological character displacement, perhaps because sampling scales and environmental covariates can obscure the role of RCD in speciation. We examined an early example of RCD in an anuran species group, the vocalizations of the sympatric cricket frogs Acris crepitans(More)
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