Kieran
Mulvaney, Discovery News
The pregnant
females leave first, setting out from the winter breeding grounds of Mexico ’s Baja California
on the long journey north to Arctic waters off Alaska
and Siberia . During the process the nautical
families treat viewers along the west coast of the United
States and Canada
 |
| Gray whale breaching. CREDIT: National Oceanographic and Atmospheric Administration |
For those
pregnant whales, this year’s migration has been underway for about two weeks.
For the whales that bring up the rear – mothers with calves – it will be perhaps
another month yet until the young whales are ready to begin the journey. In
between, in order, come non-pregnant females without calves, adult males, and
then immature whales; all of them will swim up to 10,000 km (6,200 miles) to
the north and then, after a summer of gorging in the Arctic ,
will cover a similar distance on the return voyage.
Posts
No comments:
Post a Comment
You only need to enter your comment once! Comments will appear once they have been moderated. This is so as to stop the would-be comedian who has been spamming the comments here with inane and often offensive remarks. You know who you are!