Bald-faced hornet viable brood in the comb fragment. The physical nature of cues mediating natal comb recognition is unknown, though some researchers propose distinct cuticular hydrocarbon profiles allow wasps to recognize nest mates. "D. maculata" is characterized by low paternity, worker reproduction and queen-worker conflict. Divergent genetic interests between workers and their queen cause intra-nest struggle for control, which disrupts social organization. Because of haplodiploidy, workers are unable to mate. However, their unfertilized eggs become males. Workers and their queens are most related to their own sons. Natural selection will therefore favor those workers who produce their own sons rather than rearing
Ken Bald 1962,by which time Bald had started drawing his next strip, "Dr. Kildare." Bald and writer Elliot Caplin produced the daily strip "Dr. Kildare", based on the television show of that name. A Sunday color strip was added beginning on April 19, 1964. Comics historian Maurice Horn said, "Bald, who modeled the two principals on the actors who played them on television (Richard Chamberlain and Raymond Massey), drew the strip with breezy, self-assured elegance." Bald continued to draw the "Dr. Kildare" strip for 22 years until 1984, long after the 1960s television series had ended. In 1971, Bald (credited as K.