Red or White?
|1. Barn Swallow breast muscles
red. A Barn Swallow may fly over 600 miles a day just
feeding on bugs. Its muscles must work steadily for a
|2. Crane wing muscles
are a combination of red and white. Cranes don't fly
a lot every day, so it would be a waste of energy to
have mostly red muscles. When they
do fly, they can soar on thermals, resting their wings
instead of flapping.
|3. Crane leg muscles
red. Cranes spend most of their day walking, and cannot
get too tired.
|4. Hummingbird wing muscles
||These are made up of 100% red muscle fibers!
|5. Eagle wing muscles
fly more often than cranes, and flap while fishing, so
their wings need more red muscle fibers than cranes (
but not nearly as many as hummers).
|6. Eagle leg muscles
combination of red and white. Eagles use their legs for powerful strikes,
but don't need to have too many red muscles since they don't use their
leg muscles except when fishing.
|7. Red-winged Blackbird wing muscles
red. When red-wings are migrating, they flap the whole
way. Just flying between their nesting territory and
feeding areas requires a
lot of steady flapping.
|8. Loon wing muscles
of red and white, mostly red. Loons rest their wings
most of the time, but when they do fly, they must beat
their wings steadily for long periods.
|9. Loon leg muscles
swim all day with a lot of steady paddling, so their
leg muscle fibers are mostly red.
|10. Robin wing muscles
||Mostly red. Robins do a lot of flying every day, and during migration must flap steadily for long distances.
|11. Robin leg muscles
red. Robins feed by hopping and running on lawns, so
they use their leg muscles fairly steadily.