COVER PHOTO: SUNNYS – ADOBE STOCK

PuzzleLux - - News -

CON­TEXT: THE LONGER DAY­LIGHT HOURS OF SPRING SIG­NAL A HOR­MONAL CHANGE IN THE NORTH­ERN CAR­DI­NAL. THIS CAUSES THEIR GO­NADS TO GROW LARGER AND THUS STIM­U­LATES THEIR SONG SIG­NAL­ING THE START OF THE BREED­ING SEA­SON.

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