diff --git a/src/llm/local_llm.py b/src/llm/local_llm.py
index 981ab46..8abc543 100644
--- a/src/llm/local_llm.py
+++ b/src/llm/local_llm.py
@@ -12,8 +12,9 @@
 import argparse
 import json
 import sys
+import re
 from pathlib import Path
-from typing import Optional
+from typing import Optional, List
 
 from ollama import chat
 from pydantic import BaseModel, Field
@@ -52,6 +53,7 @@ def extract_metrics_from_text(text: str, model: str = "llama3.1:8b") -> Predator
 - Look in tables, methods, and results sections
 - Empty stomachs: "empty", "vacant", "no prey"
 - Non-empty stomachs: "with prey", "fed", "containing food"
+- Page markers appear as [PAGE N] in the text
 
 EXTRACT:
 - species_name: Scientific name of PRIMARY predator studied (not prey)
@@ -138,6 +140,11 @@ def main():
 
     # Extract metrics
     print(f"Extracting metrics from {text_path.name}...", file=sys.stderr)
+
+    # Store original text for page extraction
+    original_text = text
+    print(f"[INFO] Text size: {len(text)} chars", file=sys.stderr)
+
     try:
         metrics = extract_metrics_from_text(text, model=args.model)
     except Exception as e:
@@ -148,6 +155,19 @@ def main():
     metrics_dict = metrics.model_dump()
     metrics_dict = validate_and_calculate(metrics_dict)
 
+    # Extract page numbers programmatically from where data was found
+    source_pages = set()
+    for field, value in metrics_dict.items():
+        if value and field not in ['fraction_feeding']:
+            value_str = str(value)
+            if value_str in original_text:
+                pos = original_text.find(value_str)
+                page_markers = re.findall(r'\[PAGE (\d+)\]', original_text[:pos])
+                if page_markers:
+                    source_pages.add(int(page_markers[-1]))
+
+    metrics_dict["source_pages"] = sorted(list(source_pages)) if source_pages else None
+
     # Prepare output
     result = {"source_file": text_path.name, "metrics": metrics_dict}
 
diff --git a/src/preprocessing/pdf_text_extraction.py b/src/preprocessing/pdf_text_extraction.py
index a51ee2c..d3cbf12 100644
--- a/src/preprocessing/pdf_text_extraction.py
+++ b/src/preprocessing/pdf_text_extraction.py
@@ -156,7 +156,8 @@ def extract_text_from_pdf(pdf_path: str) -> str:
                     img = Image.open(io.BytesIO(pix.tobytes("png")))
                     page_text = pytesseract.image_to_string(img)
 
-                text.append(page_text)
+                # Add page marker for tracking
+                text.append(f"[PAGE {page_num}]\n{page_text}")
     except Exception as e:
         print(f"[ERROR] Failed to extract text from {pdf_path}: {e}", file=sys.stderr)
         return ""
@@ -177,7 +178,8 @@ def extract_text_from_pdf_bytes(data: bytes) -> str:
                     pix = page.get_pixmap(dpi=300)
                     img = Image.open(io.BytesIO(pix.tobytes("png")))
                     page_text = pytesseract.image_to_string(img)
-                text.append(page_text)
+                # Add page marker for tracking
+                text.append(f"[PAGE {page_num}]\n{page_text}")
     except Exception as e:
         print(f"[ERROR] Failed to extract text from PDF bytes: {e}", file=sys.stderr)
         return ""