THE ROOSTER WHO TATTLED ON PETER
The Olivet Discourse concludes with Christ prophetically announcing His own crucifixion at the upcoming Passover festival (Matthew 26:2). Obviously the Passover feast (which the ritualistic Jews had culturally transformed into a religious festival) is a Messianic type that foreshadowed Jesus the Christ (1st Corinthians 5:7), the unique Lamb of God  Who takes away the sin of the world (John 1:29). The Passover continues to be mentioned by Matthew, from its celebration by Christ, in the “upper room” (Matthew 26:20-29), through the events of Christ’s crucifixion, which was the ultimate Passover, teleologically speaking.
Again, Christ is the great Shepherd of the “sheep” (i.e., believers, called “the flock of God” in 1st Peter 5:2), and He refers to His disciples as His “sheep” (Matthew 26:31) which He protects, redemptively, as He satisfies the prophecy of Zechariah 13:7.
The Matthew reports a disappointing incident in the life of the usually bold apostle Peter: Peter’s betrayal of Christ, as predicted by Christ.
Of course, this is the famous tattle-tale rooster, Gallus gallus domesticus — featured within Flag That Bird! – (Part 1)
This display of Peter’s imperfect courage and loyalty (even though his inward belief never failed) is linked to the thrice-crowing of a “cock” [alektôr], i.e., a rooster (Matthew 26:34), the last allusion to an animal in Matthew’s Gospel. What a sad note to end with!
Yet, dispensationally speaking (i.e., in light of Romans chapters 9-11), the temporary failure of Peter, then, illustrates how the Jewish nation temporally failed to courageously and loyally endorse its Messiah, when He first came to them (John 1:10-11). But God’s rejection of unbelieving Israel is only temporary, as Romans chapter 11 indicates (see especially Romans 11:25).
Matthew’s Gospel documents who the Jewish nation failed her Messiah, so the newly promised “Church”-building (Matthew 16:17-18) program was established by God, as He put His workings through Israel on “hold”.
But the predicted thrice-crowing of the rooster  is not the last animal lesson in Christ’s cosmic curriculum. While we serve our Lord, daily (by His grace), we know and await that glorious day when He shall return to His own creation, not meekly riding a donkey with its colt, but triumphantly and powerfully galloping—on a white “horse” [hippos]—to Earth as Kings of kings and Lord of lords (Revelation 19:11-16)!
After the rooster crowed thrice (Matthew 26:69-75)—showing Peter’s moral weakness and Christ’s prophetic foreknowledge,–Christ offered Himself up, for our sins, as the true Lamb of God (Matthew chapter 27). After He fulfilled the “sign of Jonah”—rising from the dead (!) triumphing over death itself (Matthew chapter 28),—Christ visited His disciples and charged them (and us in their wake) with the Great Commission (Matthew 28:18-20).
Meanwhile, as we await the eschatological consummation of God’s foreordained plan for Earth history (which always fits His divine foreknowledge and decision-making – 1st Peter 1:2-4 & Romans 8:18-30), we are equipped by His indwelling Spirit (Romans 8:9-1), and by His holy Scriptures (2nd Peter 2:16-21), which provide us with revealed truth even more sure than the miraculous experience that Peter had, seeing Christ’s glory, when Peter was an eye-witness on the Mount of Transfiguration (2nd Peter 1:16-19).
May we appreciate Christ’s glory and truth as we treasure that “more sure word of prophecy”, the written Word of God which reveals to us the living Word of God!