NATURE'S REVIVAL 
19 
marsh. This returning wanderer should be welcomed 
for the great range of his travels. Not content with 
seeking a comfortable climate for the winter, his 
restless spirit impels him to go on southward 
through Mexico and along the isthmus into South 
America, and across the equator to where the months 
of northern winter bring a rising temperature. The 
insatiable energy shown in his swift, eager run along 
the shore, his cries of alarm when taking wing, his 
unending calls and sustained flights reveal the spirit 
that prompts his long southern journey. 
Spring recalls the peculiar ways of our migrating 
visitors. We have some that travel in an indifferent 
way, varying their habits with the season's tempera- 
ture, They merely grow less numerous toward the 
north in winter, while appearing in greater numbers 
in the warmer sone. Excessively cold winters bring 
down the Purple and Evening Grosbeaks, the Canada 
Jay, and Snowy Owl from their northern retreats. 
Some, like the Robin, leave an occasional straggler 
behind all winter, while the majority spend the 
season in the Southern States, There are Plover that 
go to the extreme limit of Patagonia, returning in 
response to the same strange impulse to breed within 
the arctic circle. There are Waders that migrate with 
a regularity that would suggest a personally conducted 
tour or some kind of systematic organisation. Some 
aquatic birds have very irregular habits, depending 
