Altricial American bees behavior bird Bird birds Birds Birdsong blackbirds Blackbirds bluebirds Brown-headed burrs chimney chronobiology Clayton collective conservation Cowbird Crows cycles deer Draba dynamics earthworms Echolocation European evolution fall Feeders flight flocking Fox Frogs game Horsehair Hummingbirds, Ian Importance jayhawks Katydids Kestrel Mast McLeod Meteor migration Migration mobbing monarch Moon movement native Neotropical nighttime Non-native nouns of Parasitism Perseid plant Pleiades poolse population Precocial psychology Red Redwing Reproductive risk/benefit Ruby-throated Shorebirds Song Sparrow Starlings Strategies Sun Susan swifts teal Territory theory urban Vernal visitors Waltz webworms weeds Wetlands Wetlands, Winter Worms
Winter weeds, nighttime visitors at your birdfeeder, a study of human influence on sparrow evolution. Discussion of bird feeding.
See Wild Ideas...the Podcast 10 for discussion of mobbing behavior how game theory strategies apply to the risk-benefit of smaller birds mobbing a predator.
The kadydid waltz can be found at:http://www.sarahandlisa.com/home.html
Turgor pressure: the outward pressure of water on cell walls. There are approximately 1,200 species of sphinx moths throughout the world with most species residing in the tropics.