Australian cockatoos birds cockatoo grass eaters pets seed eaters sulphur crested cockatoo white white cockatoo yellow beak bird finch grass plant seed eater small water Australian galah grass feeder gray pink and grey background breadcrumbs brown buff Camouflage camouflaged climate-tolerant common common-pest contrast dark ever-expanding populations fauna grey house sparrows insect-eaters introduced-species Matthew 10:29 mottled Old-World-sparrows passer domesticus passerine-birds pest plump powerful-beaks prolific seed-eaters social sparrow sparrows textures true-sparrows two-a-penny worldwide-distribution ever-expanding-populations house-sparrows Luke 12:6-7 Matthew 10:29-31 passer-domesticus pavement climate tolerant feeding paving abundant affectionate Australia-wide Australian-parrots Australian-pink-cockatoo eolophus-roseicapillus familiar friendly galahs grass-feeder intelligent parrot pet pink-and-grey rose-breasted-cockatoo rose-pink roseate-cockatoo rosies seed-eater widespread willock-cockatoos