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Acoustic communication is critical during early life phases in precocial birds; for example, adult alarm calls can elicit antipredator behaviour in young, and chick vocalizations can communicate information to parents about chick identity, condition, location, sex or age. We opportunistically recorded Red‐capped Plover Charadrius ruficapillus and Southern Masked Lapwing Vanellus miles novaehollandiae...
Embryonic vocalizations in birds may enable communication between embryos and incubating parents but responses of parents to embryonic vocalizations have not been measured experimentally. In two ground‐nesting shorebirds, we compare parental care of eggs without embryonic vocalizations, those with natural embryonic vocalizations, and those in which we experimentally introduced embryonic vocalizations,...
Ground‐nesting shorebirds rely on egg crypsis as one of their main anti‐predator defence strategies. Avian embryos vocalize late in incubation and communicate with parents through the eggshell but calls may compromise crypsis. Conceivably, embryos may cease calling when exposed to signals that suggest a predator is nearby (acoustic crypsis), but this has not been studied. Signals of nearby predators...
Advances in human technology can lead to widespread and rapid increases in interactions between wildlife and potentially disturbing stimuli. The recreational use of drones is widespread and increasing, yet laws and codes of practice which aim to manage deleterious impacts (e.g. negative interactions with wildlife) are reactionary, unscientific and inadequate.
One prominent potential negative effect...
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