"It's not like you're picking someone out of second grade to come in, strength and depth is naturally going to be there."
Bird refused to return fire when asked about Anderson's jibe, making it clear he doesn't need any extra motivation to play a Boxing Day Test against England.
"I don't read too much into what the opposition say about us. I think our frontline bowlers have shown what they can do, they've got 20 wickets every game," Bird said.
Bird added that Starc, Josh Hazlewood and Pat Cummins were a product of a fiercely-competitive Sheffield Shield competition that churns out stars and keeps incumbent Test players on their toes.
"Those guys are at the level they are now because we've got guys pushing them and keeping them honest in terms of their spot in their side," Bird said.
"Every good team needs to have competition from people outside the squad and I feel Australia have got that at the moment."
Bird used the word frustrating four times in his press conference ahead of the Boxing Day Test, describing a year in which he has been a constant in the squad but failed to play a single game.
"But I'm completely realistic in where I sit behind the fast bowlers ahead of me: Josh, Mitch, Patto (James Pattinson) and Cummo," he said.
"They're all world-class fast bowlers, I'm under no illusions where I sit.
"I'm not complaining, I'm in a better spot than some blokes are."