Kapitel 7: Reumés
- grus grus:
- "Rosa" and its (male) partner "Bernhard" in 2001 and 2003 (Fig 8); here, it is not clear whether her partner "Bernhard" has been the same in 2001; we will know better next year as "Bernhard" has been banded after catching the pair in spring 2003 the same weekend as the recording was made
- "90-Morgenschlag" in 2001 and 2003 (Fig 9)
- "Zabelsee" in 2001 and 2003 (Fig 10)
- grus americana
- pair # 1 "Herons Flats" Fig 11
- pair # 17 "Pipeline North" (the banded male is the oldest banded crane with now being 23 years old; he lost its ring in 2001 but can now be monitored until his death due to the availability of his voiceprint) Fig 12.
Results (3): Life history facts
(a) Hamburg
I
n spring 1981, a first crane pair arrived in the Hamburg nature preserve "Duvenstedter Brook". There are no records known of any cranes in this old moor which was under drainage and in agricultural use since the medieval ages and under protection and partial renaturalisation to wetlands since mid of the 1960s.
Over the years other crane pairs have settled in neighbouring territories within the preserve, exhibiting a slow growth in crane numbers from originally one to six pairs. The situation until 1997 has been summarized in Fig 13a. In maximum, 6 territories had been occupied in the early and mid nineties as determined by visual observation. Two territories had been abandoned in 1995, PM and KHB (where the female was killed in 1995 probably by a poacher and pair #3 took over in late 95 and spring 96).
