อ้างอิง ของ ฮัมมิงเบิร์ด

  1. ↑ Clark, C. J.; Dudley, R. (2009). "Flight costs of long, sexually selected tails in hummingbirds". Proceedings of the Royal Society B: Biological Sciences. 276 (1664): 2109–2115. doi:10.1098/rspb.2009.0090. PMC 2677254. PMID 19324747.
  2. ↑ Ridgely RS, Greenfield PG (2001). The Birds of Ecuador, Field Guide (1 ed.). Cornell University Press. ISBN 0-8014-8721-8.
  3. ↑ Suarez, R. K. (1992). "Hummingbird flight: Sustaining the highest mass-specific metabolic rates among vertebrates". Experientia. 48 (6): 565–70. doi:10.1007/bf01920240. PMID 1612136.
  4. ↑ "Hummingbirds". Nationalzoo.si.edu. สืบค้นเมื่อ 2013-04-01.