9514 1404 393
Answer:
75
Explanation:
Since there are twice as many chachalacas as flamingos, the ratio of flamingos to parrots to herons to chachalacas is 10:7:3:5. This is a total of 25 ratio units. Each ratio unit stands for 375/25 = 15 birds, so the number of chachalacas is 5ยท15 = 75.
There are 75 chachalacas at the sanctuary.