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Animal News
Mar. 01, 2003
This species is well named for its blue-gray head that contrasts with white 'spectacles' yellow sides, white wing bars, a greenish back and white belly and throat. However appropriate the name,...
Feb. 15, 2003
When birdwatchers list their most beautiful birds, the Swamp Sparrow is seldom, if ever, mentioned. In the world of ornithological aesthetics, sparrows get short shrift. They do not possess the...
Jan. 15, 2003
Weighing in at a little more than a penny, it must double its body weight in order to fuel its migration from breeding grounds in the Pacific Northwest (Alaska to northern California) to wintering...
Feb. 21, 1999
Un ave migratoria Neotropical es un ave que se reproduce en los Estados Unidos y el Canadá durante el verano, generalmente entre mayo y septiembre, y que pasa el resto del año en México,...
Feb. 21, 1999
La palabra pesticida es un término que abarca todos los químicos que matan o controlan aquello que los humanos han clasificado como plaga o peste.
Feb. 21, 1999
Con frecuencia, cuando pensamos en las aves que emigran a los trópicos las ubicamos en áreas cercanas como el Caribe y México.
Feb. 21, 1999
Imagine que usted ha estado viajando en su automóvil durante horas.
Feb. 21, 1999
Volar proporciona la mayor movilidad y ha hecho posible la evolución de la migración aérea como un medio para aprovechar los recursos alimenticios distantes y evitar la tensión fisiológica asociada...
Feb. 21, 1999
Varias especies de insectos, entre ellas ...experimentan ciclos vitales durante los cuales las poblaciones de cada especie se mantienen reducidas por varios años y luego son seguidas de explosiones o...
Feb. 21, 1999
En medio de un ambiente cada vez más alterado y reducido, tanto en Norteamé-rica como en la América Latina, las aves migratorias han hallado un santuario en un entorno semejante al de los bosques en...
Jan. 01, 1999
A Neotropical migratory bird is a bird that breeds in Canada and the United States during our summer and spends our winter in Mexico, Central America, South America or the Caribbean islands.
Dec. 01, 1998
The Turkey Vultures could be seen circling overhead from miles away and the smell was so strong it made your eyes tear. Pulling into the dump in Negril, Jamaica wasn't my idea of a fun way to spend a...
Oct. 15, 1998
I commonly experience the Worm-eating Warbler in two ways. During the winter, walking through the tropical forest in Belize, I hear a soft rustling through the drone of cicadas. Whipping around to...
Aug. 14, 1998
Not many raptors can match the buoyancy, ease and grace with which Mississippi kites conquer the sky.
Jul. 15, 1998
One might know the Summer Tanager by its alias, the "beebird." Due to its diet of bees, it is a well-known pest around apiaries and is persecuted by beekeepers. Primarily insectivorous, this tanager...
Jun. 14, 1998
Least terns were collected by the thousands from the Atlantic coast for this decorative purpose, only to frighteningly diminish their numbers.
Jun. 01, 1998
Practically all of the birds have arrived from their migration and spring is in full swing when the eastern wood-pewee decides to grace us with its presence.
May. 01, 1998
Those of you who have suffered from "warbler neck" may well have acquired this common birding malaise while attempting to find our Bird of the Month, high in the top of a spruce or hemlock tree.
Apr. 01, 1998
Out on the range, in the sage and pine lives the Great Basin's indomitable, spirited Empidonax, the Gray Flycatcher. The subject of much confusion in the late 19th and early 20th Centuries, this...
Mar. 01, 1998
Standing on a hilltop in central Panama in October, you might suddenly notice that the midday sky has gone dark. Sure, clouds have rolled in as usual during the rainy season, but this dark cloud...
Feb. 15, 1998
Over the quiet murmur of a woodland stream and the subtle whisper of breezes through the leaves of tall trees, the rich, liquid song of a Wood Thrush resonates through the morning air.
Jan. 14, 1998
The largest of the nine swallow species that breed in North America north of Mexico, the purple martin (Progne subis) maintains a geographic range that swoops from the western to the central...
Jan. 01, 1998
The word pesticide is a catch-all term for chemicals that kill or control anything that humans have deemed to be a pest. A danger inherent to the use of synthetic poisons is that once the chemicals...
Nov. 15, 1997
January winds in Nantucket are wicked, a ferocious combination of arctic cold and New England dampness. Downtown streets and rural woods are nearly empty—tourists and birds alike having fled for...
Sep. 15, 1997
The appearance and behavior of Swainson's Hawk is much like its close North American relatives; Red-tailed (Buteo jamaicensis), Broad-winged (Buteo platypterus), White-tailed (Buteo albicaudatus),...