Therefore, it is likely that vagina length in waterfowl represents another correlated female morphological adaptation to the phallus.
Shorebirds (Charadriiforme s) and wild waterfowl (Anseriformes) represent the major natural reservoirs of avian influenza viruses (AIVs).
Migrating wild waterfowl are assumed to represent a risk for the transmission of infectious diseases to poultry [ 11].
GPS-equipped birds represent a tiny fraction of the waterfowl population; we postulate that these birds are indicative of hundreds to thousands of migratory birds that could have been in contact with outbreak sites when poultry outbreaks were taking place in Bangladesh, and could have spread the virus along their northward migration to Qinghai Lake of China and into Mongolia and Russia.
Charadriiformes represent a monophyletic group that neither includes nor is sister to waterfowl, flamingos, bustards, sandgrouse, ibises, cranes or rails.
Waterfowl and pheasants predominate, but cranes, pigeons, parrots, and many other groups are also represented.
Three hundred AIVs were detected by qRT-PCR, representing a total PCR-positive detection rate of 1.4%,of which 51 (17%) were detected in migratory shorebirds (including 16 bar-tailed godwits, 14 red-necked stints, 11 eastern curlews, and 7 red knots) and 247 in waterfowl (including 224 dabbling ducks), corresponding to rates of 0.51% and 2.4%, respectively (Table 1).
The results suggest that increase in volumes of migratory waterfowl in the country could be associated with increased prevalence of these viruses in free-living waterfowl and poultry.
Likewise, it may be prudent to attempt to minimize waterfowl use of farm lagoons.
Waterfowl migrate through the area.
