Completar frases Gap Fill ExercisesVersión en línea ....... por Tea Cher 1 trip summer spring milkweed insects Canada NorthAmerica UnitedStates picky Mexico butterflies Monarchs are easy to spot . The have a bright orange - and - black pattern , and flutter across much of . But in recent years , people have been seeing fewer and fewer monarchs . In the of 2022 , the butterflies became officially endangered . One factor making monarchs' lives hard is that they're eaters . Monarch caterpillars only feed on plants . The also make incredibly long migrations . Every , they travel north from to the and . This takes the butterflies a few generations .
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