Table 3: Evolved swarm parameters that result in the neighborhood evolution shown in Figure 4. The corresponding flocks oscillate though repeated contraction and expansion (Figure 5).

Phenotypeα 𝑑 m i n 𝑟 𝑐 c o h 𝑐 s e p 𝑐 a l i 𝑐 r a n 𝑐 f o c 𝑎 m a x 𝑣 m a x

Figures 5 and 62.644.127.860.950.530.760.760.3612.157.16