http://www.urbanext.uiuc.edu/turkey/facts.html
• The wild turkey is native to Northern Mexico and the Eastern United States.
• The male turkey is called a tom.
• The female turkey is called a hen.
http://virtualweberbullet.com/turkeyselect.html
Hen vs. Tom
Turkeys weighing 8-16 pounds are usually female hens, while larger birds are male toms. Since supermarket turkeys are slaughtered at a young age—under 28 weeks old—both hens and toms are about the same in terms of taste, juiciness, and tenderness. Buy a turkey based on weight and don't worry about sex.

http://www.maguirefarm.com/t/turkeyinfo.htm
Gestation
A male turkey is called a Tom or sometimes called a Gobbler, and a female turkey is called a Hen. In wild turkeys males and females can be told apart by the breast feathers. Males' breast feathers have black tips, females are brown. The domestic turkeys must be artificially bred, where as wild turkeys will breed on their own. For a wild turkey the breeding season is in March and April.
http://m-w.com/dictionary/tom
Pronunciation:
\ˈtäm\
Function: noun
Etymology: Tom, nickname for Thomas
Date: 1762
1: the male of various animals: as a: tomcat b: a male turkey

Habe festgestellt, dass der Ausdruck "Tom" fuer den Truthahn in Leo anscheinend noch fehlt. Vielleicht ganz hilfreich fuer diejenigen, die demnaechst nach "Thanksgiving" Rezepten schauen (oder gar selbst einen erlegen wollen)