Over 4 years with naturally varying cone availability we quantified reproductive timing and hoarding behavior.Males completed mating 22–90 days before the onset of hoarding, whereas large numbers (45–86%) of females during large cone crop years weaned litters after hoarding commenced.Sex education programs in the United States teach students about sexual health as well as ways to avoid sexually transmitted diseases and unwanted teenage pregnancy.The three main types of programs are abstinence-only, abstinence-plus, and comprehensive sex education.
North American red squirrels () cones each autumn, but have variation in reproductive timing such that in some years the hoarding season overlaps with reproductive activity.There also was a significant decline in males’ reports of receiving formal instruction about birth control. • The share of adolescent females receiving formal instruction about how to say no to sex but receiving no instruction about birth control methods increased from 22% to 26% between 2006–20–2013. The share of adolescent males receiving similar instruction also increased during this time period, from 29% to 35%. • Declines in formal sex education were concentrated among adolescents residing in rural areas. • “Formal” sexual health education is instruction that takes place in a school, youth center, church or other community setting. “Emerging Evidence, Lessons and Practice in Comprehensive Sexuality Education, a global review.” UNESCO, 2015. This type of instruction provides a central source of information for teens. Sexuality Information and Education Council of the United States, In Good Company: Who Supports Comprehensive Sexuality Education? Office of Adolescent Health, Evaluation and performance measurement.