usnews.com store twitter facebook google+
Wednesday, January 19, 2011
Songbird’s Testosterone Surges at Sight of Thistle Blooms: Seeing the flowers in summer temperatures triggers male goldfinches’ reproductive readiness

Thistle flowers could signal to American goldfinches that the seeds the songbirds prize for baby food and parent food will soon be abundant, proposes Thomas Luloff of the University of Western Ontario in London, Canada. And in lab setups, male goldfinches housed among blooming Canadian thistles underwent physiological changes that indicate the birds got the “breed now” message from the combination of summery heat and thrilling thistles, Luloff reported January 6 at the annual meeting of the Society for Integrative and Comparative Biology.

(Photo by Will Elder, NPS.gov)

Songbird’s Testosterone Surges at Sight of Thistle Blooms: Seeing the flowers in summer temperatures triggers male goldfinches’ reproductive readiness

Thistle flowers could signal to American goldfinches that the seeds the songbirds prize for baby food and parent food will soon be abundant, proposes Thomas Luloff of the University of Western Ontario in London, Canada. And in lab setups, male goldfinches housed among blooming Canadian thistles underwent physiological changes that indicate the birds got the “breed now” message from the combination of summery heat and thrilling thistles, Luloff reported January 6 at the annual meeting of the Society for Integrative and Comparative Biology.

(Photo by Will Elder, NPS.gov)

Notes

  1. usnews posted this