Seasonal Rush   Spring deceives and chases; the swooping magpie, a male stark black and white, furiously speeds the ducking cyclist from near the five-tree hill.   Kookaburras laugh but they are serious. The pair high on the wire warns in chorus another heading across their claimed ground. One breaks, flying straight and hard to make sure the intruder leaves.   The red wattle bird rasps a ritual warning then harries a crow away from the grevilleas; forgetting size, spurred by fury. The hen is hidden in the crush of leaf and flower. I am still not sure of all…