Courtesy of Houghton Mifflin Co. During April, six species of swallows migrate in from the South. The first one to appear is the tree swallow and it nests in a natural cavity or in a nest box and ...

Leaf Anatomy. Steve Nix Botanical Structures on a Leaf . A tree's leaf is the best major botanical marker that helps in keying out and identifying any species of tree that has a leaf.

Getting to the root of long-term tree swallow declines. ScienceDaily . Retrieved June 2, 2025 from www.sciencedaily.com / releases / 2018 / 10 / 181017111043.htm ...

Tree swallow nests across Pennsylvania are being collected for an investigation into the patterns that the common, fast-flying, cavity-nesting birds might incorporate into their nest construction ...

It’s Feb. 20 and the first spring migrant is flying low over the waters of a mountain lake in Transylvania County. The first tree swallow has arrived, but winter has not yet retreated and it’s a ...

If you don’t pay attention, you run the risk of being dive-bombed and potentially plunked on the head by a particularly protective tree swallow parent. Tree swallows, with their bright white breasts ...

Tree swallows are vigilant about chasing crows from the vicinity, even dive-bombing them mercilessly on the ground and shrieking at them angrily. Get too close and they’ll threaten you, too.

Wind, rain play key role in breeding patterns of migratory tree swallows Date: April 26, 2017 Source: University of Colorado at Boulder Summary: Wind and precipitation play a crucial role in ...