Baby
on Board!
Raising
Baby Loons
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Photo
Woody Hagge |
Most birds lay their eggs in nests, and the nestlings remain
in the nest for days or weeks. Not loons! It would be incorrect to call
loon chicks "nestlings" for
more than a few hours. Once they leave the nest, they're out of there for
good!
When baby
loons are just a few hours old, they must already instinctively know
who their parents are and how to follow them, how to swim, how to beg
for food, what to do when they hear their parent make a warning call,
and how to climb up on their parent's back when they get tired or cold.
Fortunately, they know all these important things instinctively.
Keeping
Babies Warm
When any baby bird hatches, it can't regulate its body temperature at first.
It takes several days for baby loons to be able to stay warm on their own.
For several days, they swim only for short periods and then climb back up on
their parent's back. Their thick down feathers keep their skin dry, but they
still get chilled pretty fast. Doesn't it seem like robin babies must stay
warmer all snuggled under their mother in a cozy nest? Actually baby loons
get just as much warmth from riding on mom or dad's back! It helps that baby
loons have great big feet! How can this be?
Abandoning
the Babies?
Loon parents leave their babies sometime around the time that the babies are
11 weeks old. At that point the baby loons can't fly yet. They will have to
learn many things all by themselves: how to fly, how to find all their own
food, how to protect themselves against predators, and how, when, and where
to migrate.
Sometimes people think it's cruel of the parents to abandon the babies like
this. But there is a very good reason for it. Loons can't walk on land. Before
the babies can fly, they can't leave their lake, even if the lake runs out
of food. So the parents leave in order to ensure that there will be enough
food remaining for their precious babies.
Try
This! Discussion/Journaling
- How can
baby loons get as much heat when riding on their parent's back as
baby robins do when being brooded in their nest? And what does keeping
warm have to do with the big feet that baby loons have?
After your class talks this over, compare your answers with ours.
- Consider
why the nesting system of loons is so different from that of robins
or hummingbirds. Their nesting system is even different from that
of eagles, osprey, herons, and many other fish eaters. Loons nest
on the ground like ducks, but only lay 2 eggs, while ducks normally
lay at least 8—and sometimes more than a dozen. That's because
more baby loons than ducklings survive their first months. What are
the advantages and disadvantages of raising nestlings, and of chicks
leaving the nest and following their parents? And why must ducks
lay so many more eggs than loons? Here's a strategy to help think
this through:
On a page in your journal, make four columns. Mark them
- Advantages
of Raising Nestlings
- Disadvantages
of Raising Nestlings
- Advantages
of Bringing Chicks Along
- Disadvantages
of Bringing Chicks Along
List
as many items as you can think of for each column.
Then
think of at least four differences between loons and ducks that
help explain why ducks must lay so many more eggs than loons.
After you've finished, compare your answers with ours.
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