by Megan Napoli
Every year, as temperatures rise and the days become longer, we start seeing our bird migrants return.
Some birds, including the dark-eyed junco, black-capped chickadee and northern cardinal, stay all winter long because their food sources of seed are plentiful enough that energy expenditure to migrate is not justified. For various warblers, thrushes and flycatchers, who rely primarily on insects as a food source, the decision to migrate to warmer climes is necessary. Our first migrants return in early March and by mid-May migration has concluded. Read more...