Troglodytes musculus Communication 8 Troglodytes 6 songbird 6 Alarm calls 4 Aves 4 Call structure 4 Calling rate 4 Southern House Wren 4 Troglodytidae 4 alarm signal 4 bioacoustics 4 communication 4 nestling 4 Acoustic signal 2 Begging 2 Nesting cycle 2 Predation risk 2 antipredator defense 2 begging behavior 2 breeding season 2 call structure 2 calling behavior 2 calling rate 2 communication behavior 2 individual variation 2 nesting 2 ornithology 2 predation risk 2 signal function 2