Alexander John Nicholson (25 March 1895 – 28 October 1969) was an Irish Australian entomologist who specialized in insect population dynamics.
The interesting thing about sheep blowfly females is that they must receive a meal before laying eggs near the tail or by exposed wounds.
Next, the maggots hatch from the eggs, feeding on flesh of the sheep which makes them grow bigger.
The sheep possibly die when the maggots penetrate the skin and feed on their internal organs.
Due to the need of a meal for blowfly females to lay eggs, density dependence effects on their populations was studied by Nicholson.