Bleeding Hearts Hummingbirds may look dainty, but woe betide any rival suitor who takes that beak for granted. Researchers from the University of Connecticut have discovered that during breeding season, male Long-billed Hermits fight over mates by plunging their beaks into each other’s necks . . . in midair. Thanks to these bloody aerial jousts, males have developed longer and pointier beaks than females. The research team says this is the first evidence of a bird’s beak being shaped—and weaponized—by the forces of sexual selection. Number One Dad(s) Late last year a pair of Chilean Flamingos at the Edinburgh Zoo accidentally kicked their egg out of the nest and abandoned it. But thanks to the zoo’s resident gay flamingo couple, the orphaned chick gained two super-proud dads instead. This isn’t the first same-sex flamingo pair to come to the rescue; in 2007 the U.K.’s Wildfowl & Wetlands Trust gave its own committed couple, Fernando and Carlos, an abandoned...