He told me about the Tragopan, and he is positive that the blue wattle becomes gorged with blood, and not air.
"More Letters of Charles Darwin Volume II" by Charles Darwin
Tragopan Pheasant Nepal and India.
"Our Vanishing Wild Life" by William T. Hornaday
In the highest ranges the snow-cocks, the tragopans, the blood-pheasant, and the glorious monaul or Impeyan pheasant abound.
"Birds of the Indian Hills" by Douglas Dewar
BARTLETT, A. D., on the tragopan, i.
"The Descent of Man and Selection in Relation to Sex" by Charles Darwin