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Home NEWS Science News Biology

Lyrebird synchronizes elements of its mating dance

Bioengineer by Bioengineer
March 28, 2024
in Biology
Reading Time: 3 mins read
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Ithaca, NY—To woo a mate, the Albert’s Lyrebird of Australia becomes a real song-and-dance bird. Each male first chooses a stage of entangled vines, then in performance he shakes the vines as part of his courtship footwork, synchronizing each shake with the beat of his striking song. Scientists have closely analyzed and quantitatively described this behavior among lyrebirds in the wild, work now published in The American Naturalist.
 
“It’s a choreographed dance,” explained lead author Fiona Backhouse, a postdoctoral researcher with the Cornell Lab of Ornithology. “The birds use thorny vines tangled with other plants as a stage-like courtship platform. Then they grip the vines with their feet and bounce or sway from side to side, which makes the entire tangled mass of plant growth also move around. They combine this movement with two types of ‘gronking’ songs.”
 
There’s “loud gronking” and “rhythmic gronking.” Analysis shows the lyrebird’s footwork is synchronized with the beat of the rhythmic gronking song. The lyrebird’s tail is also flipped dramatically over its head during the courtship display, as in the above photo. Researchers captured the behavior with remote cameras placed among five populations of Albert’s Lyrebirds during the May 2018 through August 2019 breeding seasons. This range-restricted species lives in the fragmented rainforest habitats scattered across a small mountainous region in Australia.

Lyrebird tail flip

Credit: Alex Maisey

Ithaca, NY—To woo a mate, the Albert’s Lyrebird of Australia becomes a real song-and-dance bird. Each male first chooses a stage of entangled vines, then in performance he shakes the vines as part of his courtship footwork, synchronizing each shake with the beat of his striking song. Scientists have closely analyzed and quantitatively described this behavior among lyrebirds in the wild, work now published in The American Naturalist.
 
“It’s a choreographed dance,” explained lead author Fiona Backhouse, a postdoctoral researcher with the Cornell Lab of Ornithology. “The birds use thorny vines tangled with other plants as a stage-like courtship platform. Then they grip the vines with their feet and bounce or sway from side to side, which makes the entire tangled mass of plant growth also move around. They combine this movement with two types of ‘gronking’ songs.”
 
There’s “loud gronking” and “rhythmic gronking.” Analysis shows the lyrebird’s footwork is synchronized with the beat of the rhythmic gronking song. The lyrebird’s tail is also flipped dramatically over its head during the courtship display, as in the above photo. Researchers captured the behavior with remote cameras placed among five populations of Albert’s Lyrebirds during the May 2018 through August 2019 breeding seasons. This range-restricted species lives in the fragmented rainforest habitats scattered across a small mountainous region in Australia.

“Albert’s Lyrebirds are actually moving the structure while they’re singing so it becomes an active part of their performance,” said Backhouse. “I think what surprised me is that the vine-shaking behavior was so consistent across all individuals and populations. It seems to be a conserved species-wide trait.”
 
There can be some variation. Instead of using vines, birds may manipulate a pile of sticks but will always grip part of their stage with their feet and move up and down, so the behavior persists even on different platform structures.
 
“One possibility for why they do this vine-shaking is that it enhances their display, making the male look bigger and more vigorous by creating an impressive spectacle for a watching female,” said Backhouse. “Another possibility is that by moving the vines and shaking the surrounding vegetation they’re making it seem like there are predators nearby and the female may be more inclined to stay close by the performing male for safety.”
 
During this study, no female birds were present to witness the males’ efforts. Backhouse hopes to collect more footage, documenting what happens when female birds are watching and whether that changes the performance in any way.
 
This research was conducted by scientists from the Cornell Lab of Ornithology and Western Sydney University.



Journal

The American Naturalist

DOI

10.1086/730523

Method of Research

Imaging analysis

Subject of Research

Animals

Article Title

Performative manipulation of the environment by displaying Albert’s lyrebirds

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