In the Land of Kiwis, the Winged Variety is Disappearing - PowerPoint PPT Presentation

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In the Land of Kiwis, the Winged Variety is Disappearing

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These also eat eggs and young chicks. From easily accessible ground-nesting birds ... Chicks fledge in September. Circle Antarctic five years till adolecence ... – PowerPoint PPT presentation

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Title: In the Land of Kiwis, the Winged Variety is Disappearing


1
In the Land of Kiwis, the Winged Variety is
Disappearing
  • Article by Jane E. Brody
  • New York Times March 23, 2004
  • Link to article
  • Courtney Walker

2
Depletion of Bird Species
  • Kiwi numbers reduced, last forty years
  • Other species hurt too
  • 50 of 93 bird species remain
  • 37 of those are threatened/endangered

3
Before Humans
  • No mammals, but 3 bat species
  • Only birds, reptiles, etc.

4
Species introduced by Humans
  • 14th Century rats and dogs
  • 1700s pigs
  • 1800s rabbits, deer, and sheep
  • Bird Species blackbirds, sparrows, starlings,
    crows

5
Problems with Introduced Species
  • Competition for Habitat and resources
  • Predation of native species by exotics
  • Hunting for sport

6
Biggest Problem
  • Over population of rabbits needed controlling
  • Introduction of stoats, ferrets, and weasels
  • These also eat eggs and young chicks
  • From easily accessible ground-nesting birds
  • Namely Albatrosses, penguins, kiwi

7
Recovery of Albatrosses
  • Royal Albatross Center at Taiaroa Head
  • Only Mainland breeding site
  • Intensely monitored

8
Previous Albatross Habitat
  • Resided on Chathan Islands
  • Home to 20,000
  • Devistated by Hurricane in 1985
  • Leaving only solid rock
  • No longer good habitat

9
Albatross Life Cycle
  • Eggs hatch in January
  • Chicks fledge in September
  • Circle Antarctic five years till adolecence
  • Find mate, return to birth site
  • Three more summers till second generation

10
Also Endangered
  • Yellow-eyed Penguins
  • 2003-19 pairs successfully nested
  • Kiwis
  • Numbers cut by half every decade
  • 95 of chicks die before maturity
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