diff --git a/examples/finnegans_wake_demo/finnegans-wake-demo-l2.py b/examples/finnegans_wake_demo/finnegans-wake-demo-l2.py
index 75b61d471..98bd5ef7a 100644
--- a/examples/finnegans_wake_demo/finnegans-wake-demo-l2.py
+++ b/examples/finnegans_wake_demo/finnegans-wake-demo-l2.py
@@ -63,7 +63,7 @@ print("\n************** Setup **************\n")
 # NuCypher Network #
 ####################
 
-L1_NETWORK = 'mainnet'  # or 'ibex'
+L1_NETWORK = 'mainnet'  # or 'tapir'
 L2_NETWORK = 'polygon'  # or 'mumbai'
 
 #####################
diff --git a/examples/heartbeat_demo/alicia.py b/examples/heartbeat_demo/alicia.py
index cf8061d74..b152aba47 100644
--- a/examples/heartbeat_demo/alicia.py
+++ b/examples/heartbeat_demo/alicia.py
@@ -58,7 +58,7 @@ try:
 except KeyError:
     raise RuntimeError('Missing environment variables to run demo.')
 
-L1_NETWORK = 'mainnet'  # 'ibex'
+L1_NETWORK = 'mainnet'  # 'tapir'
 L2_NETWORK = 'polygon'  # 'mumbai'
 
 
diff --git a/examples/heartbeat_demo/doctor.py b/examples/heartbeat_demo/doctor.py
index 7b66066b8..f130de16b 100644
--- a/examples/heartbeat_demo/doctor.py
+++ b/examples/heartbeat_demo/doctor.py
@@ -38,7 +38,7 @@ from nucypher.utilities.logging import GlobalLoggerSettings
 
 GlobalLoggerSettings.start_console_logging()
 
-L1_NETWORK = 'mainnet'  # 'ibex'
+L1_NETWORK = 'mainnet'  # 'tapir'
 
 # To create a Bob, we need the doctor's private keys previously generated.
 from doctor_keys import get_doctor_privkeys
diff --git a/nucypher/blockchain/eth/networks.py b/nucypher/blockchain/eth/networks.py
index 72d4d1d1a..d13bbe8fb 100644
--- a/nucypher/blockchain/eth/networks.py
+++ b/nucypher/blockchain/eth/networks.py
@@ -19,9 +19,7 @@ along with nucypher.  If not, see <https://www.gnu.org/licenses/>.
 class NetworksInventory:  # TODO: See #1564
 
     MAINNET = "mainnet"
-    IBEX = "ibex"
     LYNX = "lynx"
-    ORYX = "oryx"
     ETH = "ethereum"
     TAPIR = "tapir"
 
@@ -34,8 +32,6 @@ class NetworksInventory:  # TODO: See #1564
 
     __to_chain_id_eth = {
         MAINNET: 1,  # Ethereum Mainnet
-        ORYX: 3,  # Ropsten
-        IBEX: 4,  # Rinkeby
         LYNX: 5,  # Goerli
         TAPIR: 5,  # Goerli
     }
diff --git a/nucypher/network/nodes.py b/nucypher/network/nodes.py
index 73ab5b16d..b5a25b77f 100644
--- a/nucypher/network/nodes.py
+++ b/nucypher/network/nodes.py
@@ -68,8 +68,6 @@ TEACHER_NODES = {
     ),
     NetworksInventory.LYNX: ("https://lynx.nucypher.network:9151",),
     NetworksInventory.TAPIR: ("https://tapir.nucypher.network:9151",),
-    NetworksInventory.IBEX: ("https://ibex.nucypher.network:9151",),
-    NetworksInventory.ORYX: ("https://oryx.nucypher.network:9151",),
 }
 
 
diff --git a/scripts/hooks/nucypher_agents.py b/scripts/hooks/nucypher_agents.py
index 9323768b9..2b5509940 100644
--- a/scripts/hooks/nucypher_agents.py
+++ b/scripts/hooks/nucypher_agents.py
@@ -51,7 +51,7 @@ except IndexError:
 try:
     network = sys.argv[1]
 except IndexError:
-    network = "ibex"
+    network = "tapir"
 
 BlockchainInterfaceFactory.initialize_interface(eth_provider_uri=eth_provider_uri, light=False, emitter=emitter)
 blockchain = BlockchainInterfaceFactory.get_interface(eth_provider_uri=eth_provider_uri)
diff --git a/tests/metrics/grant_availability.py b/tests/metrics/grant_availability.py
index 4332c3064..1d542fb02 100755
--- a/tests/metrics/grant_availability.py
+++ b/tests/metrics/grant_availability.py
@@ -69,7 +69,7 @@ except KeyError:
     raise RuntimeError(message)
 
 # Alice Configuration
-DOMAIN: str = 'mainnet'  # ibex
+DOMAIN: str = 'mainnet'  # tapir
 DEFAULT_SEEDNODE_URIS: List[str] = [
     *TEACHER_NODES[DOMAIN],
 ]