Learn how to identify a male and female tree swallow. Find out about their nests, song, range map and ... and more blue-green upperparts. Females, too, will have that blue-green, but it’ll be a ...

Metallic blue tree swallows nest in bird houses or in tree cavities. (Photo by Allan Hack) Our last two notable swallows, the tree swallow and the violet-green swallow, do not build mud nests.

Scientists in Thailand have discovered a new species of tarantula with a very unique blue hue. The tarantula is named Chilobrachys natanicharum and is also called the electric blue tarantula. The ...

The boys of summer catch flies.The birds of summer catch flies.Baseball and birdwatching may be a strange mix, but the last time I visited Veteran’s Stadium to watch a Phillies game, I was ...

Tree swallows are easily identified by their glossy blue-green upperparts, snowy white breast and belly and short forked tail. They have a gently planing flight that’s quite different to that of other ...

Tree swallows are also shiny blue above, including in a dark helmet that scrunches down firmly over their eyes, and clear white below.