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  1. kb57

    Crowned Cranes - are they introduced in the UAE?

    I get your point, and I guess this reflects the difficulty of reaching a consistent definition of 'self-sustaining'. Given sufficient data, this would be easy enough to model in terms of population dynamics (as has been done, for example, with deliberate re-introductions to estimate necessary...
  2. kb57

    Crowned Cranes - are they introduced in the UAE?

    As eBird is placing them in the 'exotic-escaped' category (i.e. Category E), this presumably means that locally they are still not accepted as a naturalised exotic (i.e. Category C)?
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