ATLANTA  Anti-abortion groups have erected scores of billboards here with an alarming message: “Black children are an endangered species.”

The groups responsible insist that they are not exaggerating, despite contrary federal data. The billboards, which show a close-up of a worried-looking African-American boy, are an effort to highlight data showing that black women get a disproportionate number of abortions, especially in Georgia, and that the number in Georgia is increasing.

“The impact of abortion has become so great that it has begun to impact our fertility rate,” said Catherine Davis, the minority outreach coordinator for Georgia Right to Life, the state’s main anti-abortion group, which has sponsored the billboards in partnership with the Radiance Foundation, a group based in Atlanta that encourages adoption.

The billboards  there are 65 now and will eventually be 80, Ms. Davis said  were created in conjunction with a new Web site, www.toomanyaborted.com, which says that all of Georgia’s abortion clinics are in “urban areas where blacks reside.” The Web site connects abortion to segregation, saying that after the civil rights era, racists went “underground,” and that today “abortion is the tool they use to stealthily target blacks for extermination.”