The songbirds are nesting and raising their chicks now - plenty of insects and seeds for them to eat. Parent birds are busy catching food for their young, and there's a little less time spent singing.
Flycatchers dart from tree limbs to catch flying insects in the air, wrens scratch on the ground, and warblers explore shrubs for catepillars and other crawling insects.
What are birds in your neighborhood doing?
(On the Journey North site (www.learner.org/jnorth) Signs of Spring section, "Going buggy! Insect eating birds" captures the many bird insect-catching strategies).