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A typical Tree Swallow "Song", given here by the male perched on the crossbar. Note its repetitious "up and down" quality.

Eastern Bluebirds and Tree Swallows often compete for nest boxes, but when they are offered 2 boxes within 10' - 15' apart they will often both nes...

Tree Swallow Gurgle or Contact Call is low and soft, unlike many of this species calls. It is commonly given by one member of a pair to the other ...

Tree swallow Tick Calls are given by males to females when they approach females with the intension of copulating. Ticks are also given when tree ...

Tree swallow Anxiety Calls may be given by residents when another tree swallow approaches or starts to intrude on their territory.

A loud raucous call often given during territorial conflicts with other tree swallows and also when predators or other dangers are perceived.

Chatter Calls are very common during the nest site claiming period. They are used by both sexes to proclaim territory (the nest site and the area ...

Here's an example demonstrating that nest box pairing (2 boxes within 10' on separate poles or both on the same pole) can reduce competition that o...