  We investigate the occupancy statistics of birds on a wire and on
higher-dimensional substrates. In one dimension, birds land one by one on a
wire and rest where they land. Whenever a newly arriving bird lands within a
fixed distance of already resting birds, these resting birds immediately fly
away. We determine the steady-state occupancy of the wire, the distribution of
gaps between neighboring birds, and other basic statistical features of this
process. We discuss conjectures for corresponding observables in higher
dimensions.
