Early April migrants include the American Woodcock, Eastern Phoebe, Eastern Towhee, Fox Sparrow, Snipe and Tree Swallow.
Research stations affiliated to the Canadian Migration Monitoring Network open on April 1 to start spring passerine research
Late April migrants include the Brown Thrasher, Pine Warbler, Palm Warbler, American Bittern, Chimney Swift, Chipping Sparrow, Barn Swallow and Caspian Tern.
Great Horned Owls have their young.
Hummingbirds and orioles arrive late April/early May. Be sure to have their feeders ready.
The Common Loon finishes its northward migration by the end of April. Some late migrants arrive in May.
Purple Martins (scouts) begin to arrive in mid April
Cardinals begin nesting.
White-throated Sparrows begin calling.
Woodcocks continue their "sky dance" courtship flights.
Bluebirds are nesting by end of the month. Be sure to have their houses ready.
Lyrids: Wake up early! This meteor show is expected to peak in the pre-dawn hours of April 22. You’ll likely spot about 10 to 20 meteors per hour (keep in mind that the approaching sunrise will hinder the shower’s visibility). According to NASA, this is one of Earth’s oldest known meteor showers — the Lyrids have been observed for about 2,700 years!