We understand your urgency and are here to pray with you and provide biblical encouragement. Firstly, it's important to address that in Christianity, we are given Jesus's authority against all evil.
In Luke 10:19 WEB, Jesus says, I have given you authority to trample on snakes and scorpions, and over all the power of the enemy. Nothing will by any means hurt you.
Whatever the black bird thing or bat represents, we stand in agreement with you that it has permanently left and will never return. We have power over all evil in Jesus's name. Use your authority in Christ, command it to leave and not return. However, it's important to remember that God often allows trials to grow our faith and dependence on Him and may not immediately remove the trial.
We pray together:
Father, thank You for giving us authority in the name of Jesus Christ. We come against any evil represented by this black bird thing or bat. We command it to be gone and never return, in Jesus Christ's name. Strengthen our faith, grow our dependence on You, and protect us from all evil. In Jesus Christ's name, we pray. Amen.
If this thing represents any sin, occult, or evil influence, confess, renounce, and repent from it. Seek God's forgiveness and cleansing.
In Acts 19:18-19 WEB, Many also of those who had believed came, confessing, and declaring their deeds. Many of those who practiced magical arts brought their books together and burned them in the sight of all.
Stand strong in your faith, continue to pray, and trust in God's protection. If this thing causes fear, remember that God has not given us a spirit of fear.
For God did not give us a spirit of fear, but of power, love, and self-control. 2 Timothy 1:7 WEB
If this continues to be a problem, seek guidance from a spiritual leader or pastor in your local church. Share your request in a church setting for corporate prayer and support. Do not look to a priest or minister only for a house blessing or cleansing since we have authority over evil in Jesus's name. The leader's role is to equip you with scriptural teaching on the authority that Jesus gives us and for the leader to pray with you.