diff --git a/ApiCore-Backend/src/apiaries/apiaries.controller.ts b/ApiCore-Backend/src/apiaries/apiaries.controller.ts
index 5f4beb3..5cb38af 100644
--- a/ApiCore-Backend/src/apiaries/apiaries.controller.ts
+++ b/ApiCore-Backend/src/apiaries/apiaries.controller.ts
@@ -1,6 +1,14 @@
-import { Body, Controller, Get, Param, Patch, Post } from '@nestjs/common';
+import {
+  Body,
+  Controller,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Query,
+} from '@nestjs/common';
 import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
-import { Role } from '../../generated/prisma';
+import { ApiaryStatus, Role } from '../../generated/prisma';
 import { Roles } from '../auth/decorators/roles.decorator';
 import { CurrentUser } from '../auth/decorators/current-user.decorator';
 import type { AuthenticatedUser } from '../auth/types/authenticated-user';
@@ -15,8 +23,11 @@ export class ApiariesController {
   constructor(private readonly apiariesService: ApiariesService) {}
 
   @Get()
-  findAll() {
-    return this.apiariesService.findAll();
+  findAll(
+    @Query('status') status?: ApiaryStatus,
+    @Query('location') location?: string,
+  ) {
+    return this.apiariesService.findAll({ status, location });
   }
 
   @Get(':id')
diff --git a/ApiCore-Backend/src/apiaries/apiaries.service.ts b/ApiCore-Backend/src/apiaries/apiaries.service.ts
index 0980b2e..8d9d9c1 100644
--- a/ApiCore-Backend/src/apiaries/apiaries.service.ts
+++ b/ApiCore-Backend/src/apiaries/apiaries.service.ts
@@ -1,10 +1,15 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
-import { Apiary } from '../../generated/prisma';
+import { Apiary, ApiaryStatus } from '../../generated/prisma';
 import { CreateApiaryDto } from './dto/create-apiary.dto';
 import { UpdateApiaryDto } from './dto/update-apiary.dto';
 
+export interface ApiaryFilter {
+  status?: ApiaryStatus;
+  location?: string;
+}
+
 @Injectable()
 export class ApiariesService {
   constructor(
@@ -12,8 +17,16 @@ export class ApiariesService {
     private readonly auditLog: AuditLogService,
   ) {}
 
-  async findAll(): Promise<Apiary[]> {
-    return this.prisma.apiary.findMany({ orderBy: { name: 'asc' } });
+  async findAll(filter: ApiaryFilter = {}): Promise<Apiary[]> {
+    return this.prisma.apiary.findMany({
+      where: {
+        status: filter.status,
+        location: filter.location
+          ? { contains: filter.location, mode: 'insensitive' }
+          : undefined,
+      },
+      orderBy: { name: 'asc' },
+    });
   }
 
   async findById(id: string): Promise<Apiary> {
diff --git a/ApiCore-Backend/src/app.module.ts b/ApiCore-Backend/src/app.module.ts
index 1b3e4c6..2946459 100644
--- a/ApiCore-Backend/src/app.module.ts
+++ b/ApiCore-Backend/src/app.module.ts
@@ -19,6 +19,7 @@ import { ExtractionsModule } from './extractions/extractions.module';
 import { HoneyBatchesModule } from './honey-batches/honey-batches.module';
 import { StorageModule } from './storage/storage.module';
 import { DashboardModule } from './dashboard/dashboard.module';
+import { SearchModule } from './search/search.module';
 import { JwtAuthGuard } from './auth/guards/jwt-auth.guard';
 import { RolesGuard } from './auth/guards/roles.guard';
 
@@ -43,6 +44,7 @@ import { RolesGuard } from './auth/guards/roles.guard';
     HoneyBatchesModule,
     StorageModule,
     DashboardModule,
+    SearchModule,
   ],
   controllers: [],
   providers: [
diff --git a/ApiCore-Backend/src/colonies/colonies.controller.ts b/ApiCore-Backend/src/colonies/colonies.controller.ts
index f9f0915..8e2a560 100644
--- a/ApiCore-Backend/src/colonies/colonies.controller.ts
+++ b/ApiCore-Backend/src/colonies/colonies.controller.ts
@@ -1,6 +1,14 @@
-import { Body, Controller, Get, Param, Patch, Post } from '@nestjs/common';
+import {
+  Body,
+  Controller,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Query,
+} from '@nestjs/common';
 import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
-import { Role } from '../../generated/prisma';
+import { ColonyStatus, Role } from '../../generated/prisma';
 import { Roles } from '../auth/decorators/roles.decorator';
 import { CurrentUser } from '../auth/decorators/current-user.decorator';
 import type { AuthenticatedUser } from '../auth/types/authenticated-user';
@@ -18,8 +26,11 @@ export class ColoniesController {
   constructor(private readonly coloniesService: ColoniesService) {}
 
   @Get()
-  findAll() {
-    return this.coloniesService.findAll();
+  findAll(
+    @Query('status') status?: ColonyStatus,
+    @Query('apiaryId') apiaryId?: string,
+  ) {
+    return this.coloniesService.findAll({ status, apiaryId });
   }
 
   @Get(':id')
diff --git a/ApiCore-Backend/src/colonies/colonies.service.ts b/ApiCore-Backend/src/colonies/colonies.service.ts
index 60ffcbf..47671e4 100644
--- a/ApiCore-Backend/src/colonies/colonies.service.ts
+++ b/ApiCore-Backend/src/colonies/colonies.service.ts
@@ -5,13 +5,18 @@ import {
 } from '@nestjs/common';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
-import { Colony } from '../../generated/prisma';
+import { Colony, ColonyStatus } from '../../generated/prisma';
 import { CreateColonyDto } from './dto/create-colony.dto';
 import { UpdateColonyDto } from './dto/update-colony.dto';
 import { MoveColonyDto } from './dto/move-colony.dto';
 import { SplitColonyDto } from './dto/split-colony.dto';
 import { MergeColonyDto } from './dto/merge-colony.dto';
 
+export interface ColonyFilter {
+  status?: ColonyStatus;
+  apiaryId?: string;
+}
+
 @Injectable()
 export class ColoniesService {
   constructor(
@@ -19,8 +24,11 @@ export class ColoniesService {
     private readonly auditLog: AuditLogService,
   ) {}
 
-  async findAll(): Promise<Colony[]> {
-    return this.prisma.colony.findMany({ orderBy: { code: 'asc' } });
+  async findAll(filter: ColonyFilter = {}): Promise<Colony[]> {
+    return this.prisma.colony.findMany({
+      where: { status: filter.status, apiaryId: filter.apiaryId },
+      orderBy: { code: 'asc' },
+    });
   }
 
   async findById(id: string): Promise<Colony> {
diff --git a/ApiCore-Backend/src/honey-batches/honey-batches.controller.ts b/ApiCore-Backend/src/honey-batches/honey-batches.controller.ts
index a5b07ae..ea100b6 100644
--- a/ApiCore-Backend/src/honey-batches/honey-batches.controller.ts
+++ b/ApiCore-Backend/src/honey-batches/honey-batches.controller.ts
@@ -1,6 +1,6 @@
-import { Body, Controller, Get, Param, Post } from '@nestjs/common';
+import { Body, Controller, Get, Param, Post, Query } from '@nestjs/common';
 import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
-import { Role } from '../../generated/prisma';
+import { HoneyBatchStatus, Role } from '../../generated/prisma';
 import { Roles } from '../auth/decorators/roles.decorator';
 import { CurrentUser } from '../auth/decorators/current-user.decorator';
 import type { AuthenticatedUser } from '../auth/types/authenticated-user';
@@ -15,8 +15,8 @@ export class HoneyBatchesController {
   constructor(private readonly honeyBatchesService: HoneyBatchesService) {}
 
   @Get()
-  findAll() {
-    return this.honeyBatchesService.findAll();
+  findAll(@Query('status') status?: HoneyBatchStatus) {
+    return this.honeyBatchesService.findAll({ status });
   }
 
   @Get(':id')
diff --git a/ApiCore-Backend/src/honey-batches/honey-batches.service.ts b/ApiCore-Backend/src/honey-batches/honey-batches.service.ts
index 58b4343..38fb946 100644
--- a/ApiCore-Backend/src/honey-batches/honey-batches.service.ts
+++ b/ApiCore-Backend/src/honey-batches/honey-batches.service.ts
@@ -1,6 +1,7 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
+import { HoneyBatchStatus } from '../../generated/prisma';
 import { CreateHoneyBatchDto } from './dto/create-honey-batch.dto';
 import { CreateHoneyMeasurementDto } from './dto/create-honey-measurement.dto';
 
@@ -17,6 +18,10 @@ const honeyBatchInclude = {
   },
 } as const;
 
+export interface HoneyBatchFilter {
+  status?: HoneyBatchStatus;
+}
+
 @Injectable()
 export class HoneyBatchesService {
   constructor(
@@ -24,8 +29,9 @@ export class HoneyBatchesService {
     private readonly auditLog: AuditLogService,
   ) {}
 
-  async findAll() {
+  async findAll(filter: HoneyBatchFilter = {}) {
     return this.prisma.honeyBatch.findMany({
+      where: { status: filter.status },
       include: honeyBatchInclude,
       orderBy: { createdAt: 'desc' },
     });
diff --git a/ApiCore-Backend/src/queens/queens.controller.ts b/ApiCore-Backend/src/queens/queens.controller.ts
index 3b3f2b2..b599bbf 100644
--- a/ApiCore-Backend/src/queens/queens.controller.ts
+++ b/ApiCore-Backend/src/queens/queens.controller.ts
@@ -1,6 +1,14 @@
-import { Body, Controller, Get, Param, Patch, Post } from '@nestjs/common';
+import {
+  Body,
+  Controller,
+  Get,
+  Param,
+  Patch,
+  Post,
+  Query,
+} from '@nestjs/common';
 import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
-import { Role } from '../../generated/prisma';
+import { QueenStatus, Role } from '../../generated/prisma';
 import { Roles } from '../auth/decorators/roles.decorator';
 import { CurrentUser } from '../auth/decorators/current-user.decorator';
 import type { AuthenticatedUser } from '../auth/types/authenticated-user';
@@ -16,8 +24,8 @@ export class QueensController {
   constructor(private readonly queensService: QueensService) {}
 
   @Get()
-  findAll() {
-    return this.queensService.findAll();
+  findAll(@Query('status') status?: QueenStatus) {
+    return this.queensService.findAll({ status });
   }
 
   @Get(':id')
diff --git a/ApiCore-Backend/src/queens/queens.service.ts b/ApiCore-Backend/src/queens/queens.service.ts
index e74b615..f7ae457 100644
--- a/ApiCore-Backend/src/queens/queens.service.ts
+++ b/ApiCore-Backend/src/queens/queens.service.ts
@@ -1,11 +1,15 @@
 import { Injectable, NotFoundException } from '@nestjs/common';
 import { PrismaService } from '../prisma/prisma.service';
 import { AuditLogService } from '../audit/audit-log.service';
-import { Queen } from '../../generated/prisma';
+import { Queen, QueenStatus } from '../../generated/prisma';
 import { CreateQueenDto } from './dto/create-queen.dto';
 import { UpdateQueenDto } from './dto/update-queen.dto';
 import { AssignColonyDto } from './dto/assign-colony.dto';
 
+export interface QueenFilter {
+  status?: QueenStatus;
+}
+
 @Injectable()
 export class QueensService {
   constructor(
@@ -13,8 +17,11 @@ export class QueensService {
     private readonly auditLog: AuditLogService,
   ) {}
 
-  async findAll(): Promise<Queen[]> {
-    return this.prisma.queen.findMany({ orderBy: { code: 'asc' } });
+  async findAll(filter: QueenFilter = {}): Promise<Queen[]> {
+    return this.prisma.queen.findMany({
+      where: { status: filter.status },
+      orderBy: { code: 'asc' },
+    });
   }
 
   async findById(id: string): Promise<Queen> {
diff --git a/ApiCore-Backend/src/search/search.controller.ts b/ApiCore-Backend/src/search/search.controller.ts
new file mode 100644
index 0000000..cd48c28
--- /dev/null
+++ b/ApiCore-Backend/src/search/search.controller.ts
@@ -0,0 +1,15 @@
+import { Controller, Get, Query } from '@nestjs/common';
+import { ApiBearerAuth, ApiTags } from '@nestjs/swagger';
+import { SearchService } from './search.service';
+
+@ApiTags('search')
+@ApiBearerAuth()
+@Controller('search')
+export class SearchController {
+  constructor(private readonly searchService: SearchService) {}
+
+  @Get()
+  search(@Query('q') q?: string) {
+    return this.searchService.search(q ?? '');
+  }
+}
diff --git a/ApiCore-Backend/src/search/search.module.ts b/ApiCore-Backend/src/search/search.module.ts
new file mode 100644
index 0000000..238d0e8
--- /dev/null
+++ b/ApiCore-Backend/src/search/search.module.ts
@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { SearchController } from './search.controller';
+import { SearchService } from './search.service';
+
+@Module({
+  controllers: [SearchController],
+  providers: [SearchService],
+})
+export class SearchModule {}
diff --git a/ApiCore-Backend/src/search/search.service.spec.ts b/ApiCore-Backend/src/search/search.service.spec.ts
new file mode 100644
index 0000000..cf1bf23
--- /dev/null
+++ b/ApiCore-Backend/src/search/search.service.spec.ts
@@ -0,0 +1,48 @@
+import { SearchService } from './search.service';
+import { PrismaService } from '../prisma/prisma.service';
+
+describe('SearchService', () => {
+  let service: SearchService;
+  let prisma: {
+    apiary: { findMany: jest.Mock };
+    colony: { findMany: jest.Mock };
+    queen: { findMany: jest.Mock };
+    task: { findMany: jest.Mock };
+    honeyBatch: { findMany: jest.Mock };
+  };
+
+  beforeEach(() => {
+    prisma = {
+      apiary: { findMany: jest.fn().mockResolvedValue([]) },
+      colony: { findMany: jest.fn().mockResolvedValue([]) },
+      queen: { findMany: jest.fn().mockResolvedValue([]) },
+      task: { findMany: jest.fn().mockResolvedValue([]) },
+      honeyBatch: { findMany: jest.fn().mockResolvedValue([]) },
+    };
+    service = new SearchService(prisma as unknown as PrismaService);
+  });
+
+  it('returns an empty array for a blank query', async () => {
+    const results = await service.search('   ');
+    expect(results).toEqual([]);
+    expect(prisma.apiary.findMany).not.toHaveBeenCalled();
+  });
+
+  it('combines matches from every entity type', async () => {
+    prisma.colony.findMany.mockResolvedValue([
+      { id: 'colony-1', code: 'V-001' },
+    ]);
+    prisma.apiary.findMany.mockResolvedValue([
+      { id: 'apiary-1', name: 'Heimstand' },
+    ]);
+
+    const results = await service.search('V-001');
+
+    expect(results).toEqual(
+      expect.arrayContaining([
+        { type: 'Colony', id: 'colony-1', label: 'V-001' },
+        { type: 'Apiary', id: 'apiary-1', label: 'Heimstand' },
+      ]),
+    );
+  });
+});
diff --git a/ApiCore-Backend/src/search/search.service.ts b/ApiCore-Backend/src/search/search.service.ts
new file mode 100644
index 0000000..345d988
--- /dev/null
+++ b/ApiCore-Backend/src/search/search.service.ts
@@ -0,0 +1,75 @@
+import { Injectable } from '@nestjs/common';
+import { PrismaService } from '../prisma/prisma.service';
+
+export interface SearchResult {
+  type: 'Apiary' | 'Colony' | 'Queen' | 'Task' | 'HoneyBatch';
+  id: string;
+  label: string;
+}
+
+const RESULT_LIMIT = 10;
+
+@Injectable()
+export class SearchService {
+  constructor(private readonly prisma: PrismaService) {}
+
+  async search(q: string): Promise<SearchResult[]> {
+    const term = q.trim();
+    if (term.length === 0) {
+      return [];
+    }
+
+    const [apiaries, colonies, queens, tasks, honeyBatches] = await Promise.all(
+      [
+        this.prisma.apiary.findMany({
+          where: { name: { contains: term, mode: 'insensitive' } },
+          take: RESULT_LIMIT,
+        }),
+        this.prisma.colony.findMany({
+          where: { code: { contains: term, mode: 'insensitive' } },
+          take: RESULT_LIMIT,
+        }),
+        this.prisma.queen.findMany({
+          where: { code: { contains: term, mode: 'insensitive' } },
+          take: RESULT_LIMIT,
+        }),
+        this.prisma.task.findMany({
+          where: { title: { contains: term, mode: 'insensitive' } },
+          take: RESULT_LIMIT,
+        }),
+        this.prisma.honeyBatch.findMany({
+          where: { batchNumber: { contains: term, mode: 'insensitive' } },
+          take: RESULT_LIMIT,
+        }),
+      ],
+    );
+
+    return [
+      ...apiaries.map((apiary) => ({
+        type: 'Apiary' as const,
+        id: apiary.id,
+        label: apiary.name,
+      })),
+      ...colonies.map((colony) => ({
+        type: 'Colony' as const,
+        id: colony.id,
+        label: colony.code,
+      })),
+      ...queens.map((queen) => ({
+        type: 'Queen' as const,
+        id: queen.id,
+        label: queen.code,
+      })),
+      ...tasks.map((task) => ({
+        type: 'Task' as const,
+        id: task.id,
+        label: task.title,
+      })),
+      ...honeyBatches.map((honeyBatch) => ({
+        type: 'HoneyBatch' as const,
+        id: honeyBatch.id,
+        label: honeyBatch.batchNumber,
+      })),
+    ];
+  }
+}
diff --git a/ApiCore-Backend/test/search.e2e-spec.ts b/ApiCore-Backend/test/search.e2e-spec.ts
new file mode 100644
index 0000000..d3f7dd0
--- /dev/null
+++ b/ApiCore-Backend/test/search.e2e-spec.ts
@@ -0,0 +1,97 @@
+import { INestApplication } from '@nestjs/common';
+import * as bcrypt from 'bcryptjs';
+import request from 'supertest';
+import { App } from 'supertest/types';
+import { PrismaService } from '../src/prisma/prisma.service';
+import { createTestApp } from './utils/create-test-app';
+import { login } from './utils/api';
+
+interface SearchResultBody {
+  type: string;
+  id: string;
+  label: string;
+}
+
+interface ColonyBody {
+  id: string;
+  status: string;
+}
+
+describe('Search and filters (e2e)', () => {
+  let app: INestApplication<App>;
+  let prisma: PrismaService;
+  const readonlyEmail = `search-e2e-readonly-${Date.now()}@example.com`;
+  const password = 'SuperSecret123!';
+  let readonlyId: string;
+  let readonlyToken: string;
+  let apiaryId: string;
+  let colonyId: string;
+  let dissolvedColonyId: string;
+  const uniqueCode = `SRCH-${Date.now()}`;
+
+  beforeAll(async () => {
+    app = await createTestApp();
+    prisma = app.get(PrismaService);
+
+    const passwordHash = await bcrypt.hash(password, 12);
+    const readonly = await prisma.user.create({
+      data: {
+        email: readonlyEmail,
+        passwordHash,
+        name: 'Readonly',
+        role: 'READONLY',
+      },
+    });
+    readonlyId = readonly.id;
+    readonlyToken = (await login(app, readonlyEmail, password)).accessToken;
+
+    const apiary = await prisma.apiary.create({
+      data: { name: `Stand ${Date.now()}` },
+    });
+    apiaryId = apiary.id;
+    const colony = await prisma.colony.create({
+      data: { code: uniqueCode, apiaryId, colonyType: 'PRODUCTION_COLONY' },
+    });
+    colonyId = colony.id;
+    const dissolvedColony = await prisma.colony.create({
+      data: {
+        code: `${uniqueCode}-DISSOLVED`,
+        apiaryId,
+        colonyType: 'PRODUCTION_COLONY',
+        status: 'DISSOLVED',
+      },
+    });
+    dissolvedColonyId = dissolvedColony.id;
+  });
+
+  afterAll(async () => {
+    await prisma.colony.deleteMany({
+      where: { id: { in: [colonyId, dissolvedColonyId] } },
+    });
+    await prisma.apiary.deleteMany({ where: { id: apiaryId } });
+    await prisma.refreshToken.deleteMany({ where: { userId: readonlyId } });
+    await prisma.auditLog.deleteMany({ where: { userId: readonlyId } });
+    await prisma.user.deleteMany({ where: { id: readonlyId } });
+    await app.close();
+  });
+
+  it('finds a colony by its code across entity types', async () => {
+    const response = await request(app.getHttpServer())
+      .get(`/api/v1/search?q=${uniqueCode}`)
+      .set('Authorization', `Bearer ${readonlyToken}`)
+      .expect(200);
+    const results = response.body as SearchResultBody[];
+    expect(
+      results.some((entry) => entry.type === 'Colony' && entry.id === colonyId),
+    ).toBe(true);
+  });
+
+  it('filters colonies by status', async () => {
+    const response = await request(app.getHttpServer())
+      .get(`/api/v1/colonies?status=DISSOLVED&apiaryId=${apiaryId}`)
+      .set('Authorization', `Bearer ${readonlyToken}`)
+      .expect(200);
+    const colonies = response.body as ColonyBody[];
+    expect(colonies.map((entry) => entry.id)).toEqual([dissolvedColonyId]);
+  });
+});
diff --git a/TASKS.md b/TASKS.md
index 894d4ba..827967a 100644
--- a/TASKS.md
+++ b/TASKS.md
@@ -121,7 +121,7 @@ Abgeleitet aus [`docs/lastenheft.md`](docs/lastenheft.md) Abschnitt 26. Reihenfo
 
 - Backend: `SearchModule` (`GET /api/v1/search?q=`), Filter-Query-Parameter in bestehenden List-Endpunkten (Standort, Status, Zeitraum etc., kombinierbar)
 - Frontend: `/search`, Filterleisten in allen Listen-Views
-- [ ] Backend-Modul fertig, getestet, grün, committet
+- [x] Backend-Modul fertig, getestet, grün, committet
 - [ ] Frontend-Views fertig, getestet, grün, committet
 
 ### 15. Responsive Smartphone-Oberfläche