The PISI's are here

  • Huge numbers of Pine Siskins have arrived in Juneau this winter.
  • One of the main attractions for them is the abundance of alder cones.
  • They feed heavily on the seeds within these cones.
  • How many do you think they need to eat in a day?
  • What is the nutritional quality of these seeds?
  • Why do Pine Siskins fight at bird feeders but not (usually) at alder trees?
  • Look at this essay by Mary Willson on Pine Siskins and Redpolls
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