Answer: jackdaws

AnswerCrossword Clue
JACKDAWSStart of a 31-letter pangram (a sentence with all 26 letters)
JACKDAWSBlack birds.
JACKDAWSGrackles.
JACKDAWSBlack birds known for thievery
jackdawsJACKDAW, a bird resembling a crow
jackdawsA small, gray-headed crow that typically nests in tall buildings and chimneys, noted for its inquisitiveness