Birdsong has been the subject of broad research from a variety of sub‐disciplines and has
taught us much about the evolution, function, and mechanisms driving animal …

Variation in communicative complexity has been conceptually and empirically attributed to
social complexity, with animals living in more complex social environments exhibiting more …

Animals produce a wide array of sounds with highly variable acoustic structures. It is
possible to understand the causes and consequences of this variation across taxa with …

Anthropogenic noise affects the behavior of a variety of animal taxa around the world. In
many taxa, minimum frequencies of acoustic signals increase with ambient noise levels, and …

Mating signals may diversify as a byproduct of morphological adaptation to different foraging
niches, potentially driving speciation. Although many studies have focused on the direct …

The concept of a macroevolutionary trade-off among sexual signals has a storied history in
evolutionary biology. Theory predicts that if multiple sexual signals are costly for males to …

Studies of trilled vocalizations provide a premiere illustration of how performance constraints
shape the evolution of mating displays. In trill production, vocal tract mechanics impose a …

Complex signals, involving multiple components within and across modalities, are common
in animal communication. However, decomposing complex signals into traits and their …

There is growing interest in latitudinal effects on animal behaviour and life history. One
recent focus is on birdsong, which is hypothesized to be more elaborated or complex in the …

Studying the macroevolution of the songs of Passeriformes (perching birds) has proved
challenging. The complexity of the task stems not just from the macroevolutionary and …