algal-forager amblyrhynchus-cristatus black color colored colors colour coloured colours crest-of-spines forage forager graceful-swimmer heat-absorption Iguana large lethargic lethargy lizard long-sharp-claws marine-iguana marine-reptile reptile reptilian salt salty sea spikes spiky spiky-dorsal-fin subtidal-algae-forager sun-absorption Sunbather Accipitridae Australian aves aviceda-subcristata banded bands barred-abdomen beak big-eyes bird Bird-of-prey crested crested-baza crested-hawk dark dark-bands distinctive distinctive-underside-bars eyes falconiformes feathers gray grey grip hawk hooked-beak medium-sized-hawk-species omnivore omnivorous pacific-baza pacific-cuckoo-falcon plumage raptor spiky-crest talons wings yellow-eyes