Hi Jenny and others As Bob Green has intimated, there is no need to invoke the immigration hypothesis to explain flocks of 2000+ Magpie Geese in Victoria. That is now the size of the sw Vic – se SA population and is indicative of the success of a re-introduction program initiated by the Victorian Fisheries and Wildlife Dept during the late 1960s. Most of the time the population is highly dispersed, but when they aggregate for breeding at Bool Lagoon, or at drought refuges such as Lake Yambuk, we get an indication of the total population size – at least 2000 and possibly as many as 4000 birds. Peter Menkhorst Melbourne _______________________________________________ Birding-Aus mailing list Birding-Aus@birding-aus.org To change settings or unsubscribe visit: http://birding-aus.org/mailman/listinfo/birding-aus_birding-aus.org