<\/a>A blackpoll warbler singing from a treetop in South Fairbanks. (Courtesy Photo | Ned Rozell)<\/p><\/div>\n\t\t\t\t
I saw this black-and-white bird, smaller than my hand, its beak open, music pouring out. I remembered the blackpoll warbler making headlines a few years ago. Researchers had discovered that, in fall, after crossing North America from the far north, the birds leap off branches on the East Coast. They then fly thousands of miles over the open Atlantic Ocean on their way to South America.<\/p>\n\t\t\t\t
A team including William DeLuca of the University of Massachusetts, Amherst, travelled to Denali National Park and Nome, as well as Churchill, Manitoba, and Whitehorse, Yukon. They captured male blackpoll warblers, and fitted some with geolocator tags, which detect the amount of sunlight to which the birds are exposed. Later, teammates on the East Coast recaptured a few, and removed the geolocators for a look.<\/p>\n\t\t\t\t
In fall, the Nome warblers took 18 days to fly across North America to the Atlantic coast; a few went to the beaches of North and South Carolina. The birds spent a month there gorging on insects and maybe fruits, before popping from their perches.<\/p>\n\t\t\t\t
They then underwent a non-stop, two-and-one-half day flight across the Atlantic Ocean to wintering grounds in Columbia, Venezuela and Brazil. The farthest of the flyers traveled as much as 12,400 miles roundtrip each year.<\/p>\n\t\t\t\t
About the blackpoll warbler’s over-water journey of 2,000 miles without stopping to refuel, researchers Timothy and Janet Williams wrote: “If a blackpoll warbler were burning gasoline instead of its reserves of body fat, it could boast of getting 720,000 miles to the gallon.”<\/p>\n\t\t\t\t
Though this amazing creature singing from a branch in South Fairbanks is one of perhaps 60 million blackpoll warblers — with three-quarters of those breeding in the boreal forest that sweeps across Canada, and one-quarter here in Alaska’s boreal forest — that number of blackpoll warblers was almost twice as high in the mid 1960s.<\/p>\n\t\t\t\t
Scientists with Partners in Flight wrote that the birds’ decline is probably due to changes in the boreal forest because of warming of the atmosphere. They also wrote about the loss of the forest due to extractive industries, as well as the perils of the warblers’ incredible journey. The researchers noted that 586 migrating blackpoll warblers died in one day in Florida, after striking a lighted tower there.<\/p>\n\t\t\t\t
As for the blackpoll warbler I saw in South Fairbanks, I wished him a successful summer. In my mind’s eye, I imagined the first birches flagging yellow in early autumn, when that bird would again be crossing the greens and browns of North America. Near a Carolina beach it would rest for a bit before making a big leap, then flapping and gliding over the deep blue of the Caribbean Sea.<\/p>\n\t\t\t\t
• Since the late 1970s, the University of Alaska Fairbanks’ Geophysical Institute has provided this column free in cooperation with the UAF research community. Ned Rozell is a science writer for the Geophysical Institute.<\/em><\/p>\n\t\t\t","protected":false},"excerpt":{"rendered":"The sun rose with the color of an orange Creamsicle. <\/p>\n","protected":false},"author":106,"featured_media":61299,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_stopmodifiedupdate":false,"_modified_date":"","wds_primary_category":9,"footnotes":""},"categories":[9,4],"tags":[149],"yst_prominent_words":[],"class_list":["post-61298","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-home","category-news","tag-outdoors"],"_links":{"self":[{"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/posts\/61298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/users\/106"}],"replies":[{"embeddable":true,"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/comments?post=61298"}],"version-history":[{"count":0,"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/posts\/61298\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/media\/61299"}],"wp:attachment":[{"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/media?parent=61298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/categories?post=61298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/tags?post=61298"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/www.juneauempire.com\/wp-json\/wp\/v2\/yst_prominent_words?post=61298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}