diff --git a/datastore/species_test.go b/datastore/species_test.go
index a540a99..62235ba 100644
--- a/datastore/species_test.go
+++ b/datastore/species_test.go
@@ -96,3 +96,38 @@ func TestSpeciesStore_List_db(t *testing.T) {
 		t.Errorf("got species %+v, want %+v", species, want)
 	}
 }
+
+func TestSpeciesStore_Update_db(t *testing.T) {
+	tx, _ := DB.Begin()
+	defer tx.Rollback()
+
+	// Test on a clean database
+	tx.Exec(`DELETE FROM species;`)
+
+	d := NewDatastore(nil)
+	// Add a new record
+	genus := &models.Genus{GenusName: "Test Genus"}
+	_, err := d.Genera.Create(genus)
+	if err != nil {
+		t.Fatal(err)
+	}
+	created := &model.Species{GenusId: genus.Id, SpeciesName: "Test Species"}
+	_, err := d.Species.Create(created)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !created {
+		t.Error("!created")
+	}
+
+	// Tweak it
+	species.SpeciesName = "Updated Species"
+	updated, err := d.Species.Update(species.Id, species)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if !updated {
+		t.Error("!updated")
+	}
+}
diff --git a/models/species.go b/models/species.go
index faf6820..b742de8 100644
--- a/models/species.go
+++ b/models/species.go
@@ -29,6 +29,9 @@ type SpeciesService interface {
 
 	// Create a species record
 	Create(species *Species) (bool, error)
+
+	// Update an existing species
+	Update(id int64, species *Species) (updated bool, err error)
 }
 
 var (
@@ -105,10 +108,32 @@ func (s *speciesService) List(opt *SpeciesListOptions) ([]*Species, error) {
 	return species, nil
 }
 
+func (s *speciesService) Update(id int64, species *Species) (bool, error) {
+	strId := strconv.FormatInt(id, 10)
+
+	url, err := s.client.url(router.UpdateSpecies, map[string]string{"Id": strId}, nil)
+	if err != nil {
+		return false, err
+	}
+
+	req, err := s.client.NewRequest("PUT", url.String(), species)
+	if err != nil {
+		return false, err
+	}
+
+	resp, err := s.client.Do(req, &species)
+	if err != nil {
+		return false, err
+	}
+
+	return resp.StatusCode == http.StatusOK, nil
+}
+
 type MockSpeciesService struct {
 	Get_    func(id int64) (*Species, error)
 	List_   func(opt *SpeciesListOptions) ([]*Species, error)
 	Create_ func(species *Species) (bool, error)
+	Update_ func(id int64, species *Species) (bool, error)
 }
 
 var _ SpeciesService = &MockSpeciesService{}
@@ -133,3 +158,10 @@ func (s *MockSpeciesService) List(opt *SpeciesListOptions) ([]*Species, error) {
 	}
 	return s.List_(opt)
 }
+
+func (s *MockSpeciesService) Update(id int64, species *Species) (bool, error) {
+	if s.Update_ == nil {
+		return false, nil
+	}
+	return s.Update_(id, species)
+}
diff --git a/models/species_test.go b/models/species_test.go
index 4e6873b..cb66f9e 100644
--- a/models/species_test.go
+++ b/models/species_test.go
@@ -105,3 +105,34 @@ func TestSpeciesService_List(t *testing.T) {
 		t.Errorf("Species.List return %+v, want %+v", species, want)
 	}
 }
+
+func TestSpeciesService_Update(t *testing.T) {
+	setup()
+	defer teardown()
+
+	want := &Species{Id: 1, GenusId: 1, SpeciesName: "Test Species"}
+
+	var called bool
+	mux.HandleFunc(urlPath(t, router.UpdateSpecies, map[string]string{"Id": "1"}), func(w http.ResponseWriter, r *http.Request) {
+		called = true
+		testMethod(t, r, "PUT")
+		testBody(t, r, `{"id":1,"genus_id":1,"species_name":"Test Species Updated","created_at":"0001-01-01T00:00:00Z","updated_at":"0001-01-01T00:00:00Z","deleted_at":"0001-01-01T00:00:00Z"}`+"\n")
+
+		w.WriteHeader(http.StatusOK)
+		writeJSON(w, want)
+	})
+
+	species := &Species{Id: 1, GenusId: 1, SpeciesName: "Test Species Updated"}
+	updated, err := client.Species.Update(1, species)
+	if err != nil {
+		t.Errorf("Species.Update returned error: %v", err)
+	}
+
+	if !updated {
+		t.Error("!updated")
+	}
+
+	if !called {
+		t.Fatal("!called")
+	}
+}
diff --git a/router/api.go b/router/api.go
index 2ffa19a..5bf24d2 100644
--- a/router/api.go
+++ b/router/api.go
@@ -21,6 +21,7 @@ func API() *mux.Router {
 	m.Path("/species").Methods("GET").Name(SpeciesList)
 	m.Path("/species").Methods("POST").Name(CreateSpecies)
 	m.Path("/species/{Id:.+}").Methods("GET").Name(Species)
+	m.Path("/species/{Id:.+}").Methods("PUT").Name(UpdateSpecies)
 
 	return m
 }
diff --git a/router/routes.go b/router/routes.go
index 4d7a9ac..0db9205 100644
--- a/router/routes.go
+++ b/router/routes.go
@@ -14,4 +14,5 @@ const (
 	Species       = "species"
 	CreateSpecies = "species:create"
 	SpeciesList   = "species:list"
+	UpdateSpecies = "species:update"
 )