nestling sex ratio

Paxton, E, M. Sogge, T. McCarthey, and P. Keim. 2002. Nestling sex ratio in the Southwestern willow flycatcher. The Condor. 104:877-881.

• Southwestern Willow Flycatcher
• Willow Flycatcher
• Empidonax traillii extimus
• endangered
• nestling sex ratio