alert beak bird black Branta canadensis brown Canada goose concern England english feathers flock flotilla fowl geese goose gray Great Britain grey head natural nature neck plumage pond retreat safety Surrey swim swimming wariness wary water white worry angry animal annoyed aroused cat claw concentrate concentration danger dangerous domestic ear eye fierce focus fur intent Look mammal stare watch adult adults child childcare children directing monitoring protect protection protective risk risky safeguard security sign supervised supervising supervision warning watching young appearance arid-suroounds Australian bearded bearded-dragon colour-change defensive-posture docile fauna flighty gentle grass-tree-stump lizard medium-sized native pet pet-lizard placid pogona-vitticeps reptile reptilian resting spikes spiky still wild