Rufous-bellied thrush bird chicks stretching and growing in the nest

growing stretching chicks immature rufousbellied thrush flapping practice training bird nest turdus rufiventris sabialaranjeira sabia nature birdwatcher turdidae redbellied thrush brazil reddishorange nesting young south america forest atlantic rainforest birds nest cub baby bird bird chick flap wings learning little flight learn animal tree wildlife wing feather beak freedom plumage flying free workout youth chick funny muscle