|Not many people realise, but close to where I live there is a growing population of geese consisting mainly of Branta
hybrids. They can be found year-round in North Holland, primarily near
the cities of Hoorn and Purmerend, but I am sure their distribution
range is much larger than that. I estimate that there are at least 400
breeding pairs in this area alone. In winter, it is not unusual to find
flocks of 200 or more. They can be confused with Barnacle Branta leucopsis, Canada B canadensis or Cackling Geese B hutchinsii, however, keen birders will almost certainly notice that something is not right. I call these Branta hybrids ‘North Holland Geese’ and I am positive that they are a new species in the making. Mark my words!